# HG changeset patch
# User Yaroslav Zhuravlev <yar@nginx.com>
# Date 1669657349 0
# Node ID 3a2d342533fbc0203cd2edda4d87932a921c5192
# Parent  a20b51e84c32af154412f0f11d0d890e7364d746
Updated docs for the upcoming NGINX Plus release.

diff --git a/xml/en/GNUmakefile b/xml/en/GNUmakefile
--- a/xml/en/GNUmakefile
+++ b/xml/en/GNUmakefile
@@ -72,6 +72,7 @@ REFS =									\
 		http/ngx_http_mp4_module				\
 		http/ngx_http_perl_module				\
 		http/ngx_http_proxy_module				\
+		http/ngx_http_proxy_protocol_vendor_module		\
 		http/ngx_http_random_index_module			\
 		http/ngx_http_realip_module				\
 		http/ngx_http_referer_module				\
@@ -112,6 +113,7 @@ REFS =									\
 		stream/ngx_stream_log_module				\
 		stream/ngx_stream_map_module				\
 		stream/ngx_stream_proxy_module				\
+		stream/ngx_stream_proxy_protocol_vendor_module		\
 		stream/ngx_stream_realip_module				\
 		stream/ngx_stream_return_module				\
 		stream/ngx_stream_set_module				\
diff --git a/xml/en/docs/http/ngx_http_api_module.xml b/xml/en/docs/http/ngx_http_api_module.xml
--- a/xml/en/docs/http/ngx_http_api_module.xml
+++ b/xml/en/docs/http/ngx_http_api_module.xml
@@ -2151,18 +2151,89 @@ The total number of failed SSL handshake
 <tag-desc>
 The total number of session reuses during SSL handshake.
 </tag-desc>
+<tag-name>
+<literal>no_common_protocol</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of no common protocol.
+</tag-desc>
+<tag-name>
+<literal>no_common_cipher</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of no shared cipher.
+</tag-desc>
+<tag-name>
+<literal>handshake_timeout</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of a timeout.
+</tag-desc>
+<tag-name>
+<literal>peer_rejected_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of failed SSL handshakes when nginx presented the certificate to the client but it was rejected with a corresponding alert message.
+</tag-desc>
+<tag-name>
+<literal>verify_failures</literal></tag-name>
+<tag-desc>
+SSL certificate verification errors<list type="tag">
+<tag-name>
+<literal>no_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+A client did not provide the required certificate.
+</tag-desc>
+<tag-name>
+<literal>expired_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+An expired or not yet valid certificate was presented by a client.
+</tag-desc>
+<tag-name>
+<literal>revoked_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+A revoked certificate was presented by a client.
+</tag-desc>
+<tag-name>
+<literal>hostname_mismatch</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+Server's certificate doesn't match the hostname.
+</tag-desc>
+<tag-name>
+<literal>other</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+Other SSL certificate verification errors.
+</tag-desc>
+</list>
+</tag-desc>
 </list>
 <para>Example:</para>
 <example>
 {
   "handshakes" : 79572,
   "handshakes_failed" : 21025,
-  "session_reuses" : 15762
+  "session_reuses" : 15762,
+  "no_common_protocol" : 4,
+  "no_common_cipher" : 2,
+  "handshake_timeout" : 0,
+  "peer_rejected_cert" : 0,
+  "verify_failures" : {
+    "no_cert" : 0,
+    "expired_cert" : 2,
+    "revoked_cert" : 1,
+    "hostname_mismatch" : 2,
+    "other" : 1
+  }
 }</example>
 </listitem>
 <listitem id="def_nginx_slab_zone">
 <para>Shared memory zone with slab allocator:</para>
-<list type="tag">
+Shared memory zone with slab allocator<list type="tag">
 <tag-name>
 <literal>pages</literal></tag-name>
 <tag-desc>
@@ -2395,6 +2466,60 @@ The total number of failed SSL handshake
 <tag-desc>
 The total number of session reuses during SSL handshake.
 </tag-desc>
+<tag-name>
+<literal>no_common_protocol</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of no common protocol.
+</tag-desc>
+<tag-name>
+<literal>no_common_cipher</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of no shared cipher.
+</tag-desc>
+<tag-name>
+<literal>handshake_timeout</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of a timeout.
+</tag-desc>
+<tag-name>
+<literal>peer_rejected_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of failed SSL handshakes when nginx presented the certificate to the client but it was rejected with a corresponding alert message.
+</tag-desc>
+<tag-name>
+<literal>verify_failures</literal></tag-name>
+<tag-desc>
+SSL certificate verification errors<list type="tag">
+<tag-name>
+<literal>no_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+A client did not provide the required certificate.
+</tag-desc>
+<tag-name>
+<literal>expired_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+An expired or not yet valid certificate was presented by a client.
+</tag-desc>
+<tag-name>
+<literal>revoked_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+A revoked certificate was presented by a client.
+</tag-desc>
+<tag-name>
+<literal>other</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+Other SSL certificate verification errors.
+</tag-desc>
+</list>
+</tag-desc>
 </list>
 </tag-desc>
 </list>
@@ -2423,7 +2548,17 @@ The total number of session reuses durin
   "ssl" : {
     "handshakes" : 104303,
     "handshakes_failed" : 1421,
-    "session_reuses" : 54645
+    "session_reuses" : 54645,
+    "no_common_protocol" : 4,
+    "no_common_cipher" : 2,
+    "handshake_timeout" : 0,
+    "peer_rejected_cert" : 0,
+    "verify_failures" : {
+      "no_cert" : 0,
+      "expired_cert" : 2,
+      "revoked_cert" : 1,
+      "other" : 1
+    }
   }
 }</example>
 </listitem>
@@ -2907,6 +3042,54 @@ The total number of failed SSL handshake
 <tag-desc>
 The total number of session reuses during SSL handshake.
 </tag-desc>
+<tag-name>
+<literal>no_common_protocol</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of no common protocol.
+</tag-desc>
+<tag-name>
+<literal>handshake_timeout</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of a timeout.
+</tag-desc>
+<tag-name>
+<literal>peer_rejected_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of failed SSL handshakes when nginx presented the certificate to the upstream server but it was rejected with a corresponding alert message.
+</tag-desc>
+<tag-name>
+<literal>verify_failures</literal></tag-name>
+<tag-desc>
+SSL certificate verification errors<list type="tag">
+<tag-name>
+<literal>expired_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+An expired or not yet valid certificate was presented by an upstream server.
+</tag-desc>
+<tag-name>
+<literal>revoked_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+A revoked certificate was presented by an upstream server.
+</tag-desc>
+<tag-name>
+<literal>hostname_mismatch</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+Server's certificate doesn't match the hostname.
+</tag-desc>
+<tag-name>
+<literal>other</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+Other SSL certificate verification errors.
+</tag-desc>
+</list>
+</tag-desc>
 </list>
 </tag-desc>
 <tag-name>
@@ -3120,7 +3303,16 @@ The total number of requests rejected du
         "ssl" : {
           "handshakes" : 620311,
           "handshakes_failed" : 3432,
-          "session_reuses" : 36442
+          "session_reuses" : 36442,
+          "no_common_protocol" : 4,
+          "handshake_timeout" : 0,
+          "peer_rejected_cert" : 0,
+          "verify_failures" : {
+            "expired_cert" : 2,
+            "revoked_cert" : 1,
+            "hostname_mismatch" : 2,
+            "other" : 1
+          }
         },
         "max_conns" : 20,
         "requests" : 667231,
@@ -3408,6 +3600,60 @@ The total number of failed SSL handshake
 <tag-desc>
 The total number of session reuses during SSL handshake.
 </tag-desc>
+<tag-name>
+<literal>no_common_protocol</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of no common protocol.
+</tag-desc>
+<tag-name>
+<literal>no_common_cipher</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of no shared cipher.
+</tag-desc>
+<tag-name>
+<literal>handshake_timeout</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of a timeout.
+</tag-desc>
+<tag-name>
+<literal>peer_rejected_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of failed SSL handshakes when nginx presented the certificate to the client but it was rejected with a corresponding alert message.
+</tag-desc>
+<tag-name>
+<literal>verify_failures</literal></tag-name>
+<tag-desc>
+SSL certificate verification errors<list type="tag">
+<tag-name>
+<literal>no_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+A client did not provide the required certificate.
+</tag-desc>
+<tag-name>
+<literal>expired_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+An expired or not yet valid certificate was presented by a client.
+</tag-desc>
+<tag-name>
+<literal>revoked_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+A revoked certificate was presented by a client.
+</tag-desc>
+<tag-name>
+<literal>other</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+Other SSL certificate verification errors.
+</tag-desc>
+</list>
+</tag-desc>
 </list>
 </tag-desc>
 </list>
@@ -3429,7 +3675,17 @@ The total number of session reuses durin
     "ssl" : {
       "handshakes" : 76455,
       "handshakes_failed" : 432,
-      "session_reuses" : 28770
+      "session_reuses" : 28770,
+      "no_common_protocol" : 4,
+      "no_common_cipher" : 2,
+      "handshake_timeout" : 0,
+      "peer_rejected_cert" : 0,
+      "verify_failures" : {
+        "no_cert" : 0,
+        "expired_cert" : 2,
+        "revoked_cert" : 1,
+        "other" : 1
+      }
     }
   }
 }</example>
@@ -3541,6 +3797,54 @@ The total number of failed SSL handshake
 <tag-desc>
 The total number of session reuses during SSL handshake.
 </tag-desc>
+<tag-name>
+<literal>no_common_protocol</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of no common protocol.
+</tag-desc>
+<tag-name>
+<literal>handshake_timeout</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of SSL handshakes failed because of a timeout.
+</tag-desc>
+<tag-name>
+<literal>peer_rejected_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+The number of failed SSL handshakes when nginx presented the certificate to the upstream server but it was rejected with a corresponding alert message.
+</tag-desc>
+<tag-name>
+<literal>verify_failures</literal></tag-name>
+<tag-desc>
+SSL certificate verification errors<list type="tag">
+<tag-name>
+<literal>expired_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+An expired or not yet valid certificate was presented by an upstream server.
+</tag-desc>
+<tag-name>
+<literal>revoked_cert</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+A revoked certificate was presented by an upstream server.
+</tag-desc>
+<tag-name>
+<literal>hostname_mismatch</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+Server's certificate doesn't match the hostname.
+</tag-desc>
+<tag-name>
+<literal>other</literal> (<literal>integer</literal>)
+</tag-name>
+<tag-desc>
+Other SSL certificate verification errors.
+</tag-desc>
+</list>
+</tag-desc>
 </list>
 </tag-desc>
 <tag-name>
@@ -3676,7 +3980,16 @@ The name of the shared memory <link url="https://nginx.org/en/docs/stream/ngx_stream_upstream_module.html#zone">zone</link> that keeps the group’s configuration and run-time state.
         "ssl" : {
           "handshakes" : 200,
           "handshakes_failed" : 4,
-          "session_reuses" : 189
+          "session_reuses" : 189,
+          "no_common_protocol" : 4,
+          "handshake_timeout" : 0,
+          "peer_rejected_cert" : 0,
+          "verify_failures" : {
+            "expired_cert" : 2,
+            "revoked_cert" : 1,
+            "hostname_mismatch" : 2,
+            "other" : 1
+          }
         },
         "max_conns" : 50,
         "connections" : 667231,
diff --git a/xml/en/docs/http/ngx_http_upstream_module.xml b/xml/en/docs/http/ngx_http_upstream_module.xml
--- a/xml/en/docs/http/ngx_http_upstream_module.xml
+++ b/xml/en/docs/http/ngx_http_upstream_module.xml
@@ -900,6 +900,7 @@ The <literal>least_time</literal> method
 <syntax>
     <value>address</value> ...
     [<literal>valid</literal>=<value>time</value>]
+    [<literal>ipv4</literal>=<literal>on</literal>|<literal>off</literal>]
     [<literal>ipv6</literal>=<literal>on</literal>|<literal>off</literal>]
     [<literal>status_zone</literal>=<value>zone</value>]</syntax>
 <default/>
@@ -920,7 +921,8 @@ Name servers are queried in a round-robi
 
 <para id="resolver_ipv6">
 By default, nginx will look up both IPv4 and IPv6 addresses while resolving.
-If looking up of IPv6 addresses is not desired,
+If looking up of IPv4 or IPv6 addresses is not desired,
+the <literal>ipv4=off</literal> (1.23.1) or
 the <literal>ipv6=off</literal> parameter can be specified.
 </para>
 
@@ -983,7 +985,7 @@ This directive is available as part of o
     [<literal>expires=</literal><value>time</value>]
     [<literal>domain=</literal><value>domain</value>]
     [<literal>httponly</literal>]
-    [<literal>samesite=</literal><literal>strict</literal>|<literal>lax</literal>|<literal>none</literal>]
+    [<literal>samesite=</literal><literal>strict</literal>|<literal>lax</literal>|<literal>none</literal>|<value>$variable</value>]
     [<literal>secure</literal>]
     [<literal>path=</literal><value>path</value>]</syntax>
 <syntax>
@@ -1081,13 +1083,22 @@ Adds the <literal>HttpOnly</literal> att
 </tag-desc>
 
 <tag-name id="sticky_samesite"><literal>samesite=</literal><literal>strict</literal> |
-<literal>lax</literal> | <literal>none</literal></tag-name>
+<literal>lax</literal> | <literal>none</literal> | <value>$variable</value></tag-name>
 <tag-desc>
-Adds the <literal>SameSite</literal> attribute to the cookie
-with one of the following values (1.19.4):
+Adds the <literal>SameSite</literal> (1.19.4) attribute to the cookie
+with one of the following values:
+<literal>Strict</literal>,
+<literal>Lax</literal>,
+<literal>None</literal>, or
+using variables (1.23.3).
+In the latter case, if the variable value is empty,
+the <literal>SameSite</literal> attribute will not be added to the cookie,
+if the value is resolved to
 <literal>Strict</literal>,
 <literal>Lax</literal>, or
-<literal>None</literal>.
+<literal>None</literal>,
+the the corresponding value will be assigned,
+otherwise the <literal>Strict</literal> value will be assigned.
 </tag-desc>
 
 <tag-name><literal>secure</literal></tag-name>
diff --git a/xml/en/docs/index.xml b/xml/en/docs/index.xml
--- a/xml/en/docs/index.xml
+++ b/xml/en/docs/index.xml
@@ -380,6 +380,11 @@ ngx_http_proxy_module</link>
 </listitem>
 
 <listitem>
+<link doc="http/ngx_http_proxy_protocol_vendor_module.xml">
+ngx_http_proxy_protocol_vendor_module</link>
+</listitem>
+
+<listitem>
 <link doc="http/ngx_http_random_index_module.xml">
 ngx_http_random_index_module</link>
 </listitem>
@@ -592,6 +597,11 @@ ngx_stream_proxy_module</link>
 </listitem>
 
 <listitem>
+<link doc="stream/ngx_stream_proxy_protocol_vendor_module.xml">
+ngx_stream_proxy_protocol_vendor_module</link>
+</listitem>
+
+<listitem>
 <link doc="stream/ngx_stream_realip_module.xml">
 ngx_stream_realip_module</link>
 </listitem>
diff --git a/xml/en/docs/stream/ngx_stream_upstream_module.xml b/xml/en/docs/stream/ngx_stream_upstream_module.xml
--- a/xml/en/docs/stream/ngx_stream_upstream_module.xml
+++ b/xml/en/docs/stream/ngx_stream_upstream_module.xml
@@ -543,6 +543,7 @@ The <literal>least_time</literal> method
 <syntax>
     <value>address</value> ...
     [<literal>valid</literal>=<value>time</value>]
+    [<literal>ipv4</literal>=<literal>on</literal>|<literal>off</literal>]
     [<literal>ipv6</literal>=<literal>on</literal>|<literal>off</literal>]
     [<literal>status_zone</literal>=<value>zone</value>]</syntax>
 <default/>
@@ -563,7 +564,8 @@ Name servers are queried in a round-robi
 
 <para id="resolver_ipv6">
 By default, nginx will look up both IPv4 and IPv6 addresses while resolving.
-If looking up of IPv6 addresses is not desired,
+If looking up of IPv4 or IPv6 addresses is not desired,
+the <literal>ipv4=off</literal> (1.23.1) or
 the <literal>ipv6=off</literal> parameter can be specified.
 </para>
 
diff --git a/xml/ru/GNUmakefile b/xml/ru/GNUmakefile
--- a/xml/ru/GNUmakefile
+++ b/xml/ru/GNUmakefile
@@ -60,6 +60,7 @@ REFS =									\
 		http/ngx_http_mp4_module				\
 		http/ngx_http_perl_module				\
 		http/ngx_http_proxy_module				\
+		http/ngx_http_proxy_protocol_vendor_module		\
 		http/ngx_http_random_index_module			\
 		http/ngx_http_realip_module				\
 		http/ngx_http_referer_module				\
@@ -98,6 +99,7 @@ REFS =									\
 		stream/ngx_stream_log_module				\
 		stream/ngx_stream_map_module				\
 		stream/ngx_stream_proxy_module				\
+		stream/ngx_stream_proxy_protocol_vendor_module		\
 		stream/ngx_stream_realip_module				\
 		stream/ngx_stream_return_module				\
 		stream/ngx_stream_set_module				\
diff --git a/xml/ru/docs/http/ngx_http_upstream_module.xml b/xml/ru/docs/http/ngx_http_upstream_module.xml
--- a/xml/ru/docs/http/ngx_http_upstream_module.xml
+++ b/xml/ru/docs/http/ngx_http_upstream_module.xml
@@ -908,6 +908,7 @@ server {
 <syntax>
     <value>адрес</value> ...
     [<literal>valid</literal>=<value>время</value>]
+    [<literal>ipv4</literal>=<literal>on</literal>|<literal>off</literal>]
     [<literal>ipv6</literal>=<literal>on</literal>|<literal>off</literal>]
     [<literal>status_zone</literal>=<value>зона</value>]</syntax>
 <default/>
@@ -929,8 +930,9 @@ resolver 127.0.0.1 [::1]:5353;
 <para id="resolver_ipv6">
 По умолчанию nginx будет искать как IPv4-, так и IPv6-адреса
 при преобразовании имён в адреса.
-Если поиск IPv6-адресов нежелателен,
-можно указать параметр <literal>ipv6=off</literal>.
+Если поиск IPv4- или IPv6-адресов нежелателен,
+можно указать параметр <literal>ipv4=off</literal> (1.23.1) или
+<literal>ipv6=off</literal>.
 </para>
 
 <para id="resolver_valid">
@@ -993,11 +995,11 @@ resolver_timeout 5s;
     [<literal>expires=</literal><value>время</value>]
     [<literal>domain=</literal><value>домен</value>]
     [<literal>httponly</literal>]
-    [<literal>samesite=</literal><literal>strict</literal>|<literal>lax</literal>|<literal>none</literal>]
+    [<literal>samesite=</literal><literal>strict</literal>|<literal>lax</literal>|<literal>none</literal>|<value>$переменная</value>]
     [<literal>secure</literal>]
     [<literal>path=</literal><value>путь</value>]</syntax>
 <syntax>
-    <literal>route</literal> <value>переменная</value> ...</syntax>
+    <literal>route</literal> <value>$переменная</value> ...</syntax>
 <syntax>
     <literal>learn</literal>
     <literal>create=</literal><value>$переменная</value>
@@ -1089,13 +1091,22 @@ 31 декабря 2037 года 23:55:55 GMT.
 </tag-desc>
 
 <tag-name id="sticky_samesite"><literal>samesite=</literal><literal>strict</literal> |
-<literal>lax</literal> | <literal>none</literal></tag-name>
+<literal>lax</literal> | <literal>none</literal> | <literal>$переменная</literal></tag-name>
 <tag-desc>
-Добавляет атрибут <literal>SameSite</literal> к куке
-с одним из следующих значений (1.19.4):
+Добавляет атрибут <literal>SameSite</literal> (1.19.4) к куке
+с одним из следующих значений:
+<literal>Strict</literal>,
+<literal>Lax</literal>,
+<literal>None</literal> или
+при помощи переменных (1.23.3).
+В последнем случае если переменная имеет пустое значение,
+то атрибут <literal>SameSite</literal> не будет добавлен к куке,
+если значение переменной равно
 <literal>Strict</literal>,
 <literal>Lax</literal> или
-<literal>None</literal>.
+<literal>None</literal>,
+то атрибуту будет назначено соответствующее значение,
+иначе атрибуту будет назначено значение <literal>Strict</literal>.
 </tag-desc>
 
 <tag-name><literal>secure</literal></tag-name>
diff --git a/xml/ru/docs/index.xml b/xml/ru/docs/index.xml
--- a/xml/ru/docs/index.xml
+++ b/xml/ru/docs/index.xml
@@ -385,6 +385,11 @@ ngx_http_proxy_module</link>
 </listitem>
 
 <listitem>
+<link doc="http/ngx_http_proxy_protocol_vendor_module.xml">
+ngx_http_proxy_protocol_vendor_module</link>
+</listitem>
+
+<listitem>
 <link doc="http/ngx_http_random_index_module.xml">
 ngx_http_random_index_module</link>
 </listitem>
@@ -597,6 +602,11 @@ ngx_stream_proxy_module</link>
 </listitem>
 
 <listitem>
+<link doc="stream/ngx_stream_proxy_protocol_vendor_module.xml">
+ngx_stream_proxy_protocol_vendor_module</link>
+</listitem>
+
+<listitem>
 <link doc="stream/ngx_stream_realip_module.xml">
 ngx_stream_realip_module</link>
 </listitem>
diff --git a/xml/ru/docs/stream/ngx_stream_upstream_module.xml b/xml/ru/docs/stream/ngx_stream_upstream_module.xml
--- a/xml/ru/docs/stream/ngx_stream_upstream_module.xml
+++ b/xml/ru/docs/stream/ngx_stream_upstream_module.xml
@@ -544,6 +544,7 @@ hash $remote_addr;
 <syntax>
     <value>адрес</value> ...
     [<literal>valid</literal>=<value>время</value>]
+    [<literal>ipv4</literal>=<literal>on</literal>|<literal>off</literal>]
     [<literal>ipv6</literal>=<literal>on</literal>|<literal>off</literal>]
     [<literal>status_zone</literal>=<value>зона</value>]</syntax>
 <default/>
@@ -565,8 +566,9 @@ resolver 127.0.0.1 [::1]:5353;
 <para id="resolver_ipv6">
 По умолчанию nginx будет искать как IPv4-, так и IPv6-адреса
 при преобразовании имён в адреса.
-Если поиск IPv6-адресов нежелателен,
-можно указать параметр <literal>ipv6=off</literal>.
+Если поиск IPv4- или IPv6-адресов нежелателен,
+можно указать параметр <literal>ipv4=off</literal> (1.23.1) или
+<literal>ipv6=off</literal>.
 </para>
 
 <para id="resolver_valid">
diff --git a/yaml/nginx_api.yaml b/yaml/nginx_api.yaml
--- a/yaml/nginx_api.yaml
+++ b/yaml/nginx_api.yaml
@@ -2204,10 +2204,57 @@ definitions:
       session_reuses:
         type: integer
         description: The total number of session reuses during SSL handshake.
+      no_common_protocol:
+        type: integer
+        description: The number of SSL handshakes failed
+          because of no common protocol.
+      no_common_cipher:
+        type: integer
+        description: The number of SSL handshakes failed
+          because of no shared cipher.
+      handshake_timeout:
+        type: integer
+        description: The number of SSL handshakes failed
+          because of a timeout.
+      peer_rejected_cert:
+        type: integer
+        description: The number of failed SSL handshakes
+          when nginx presented the certificate to the client
+          but it was rejected with a corresponding alert message.
+      verify_failures:
+        type: object
+        description: SSL certificate verification errors
+        properties:
+          no_cert:
+            type: integer
+            description: A client did not provide the required certificate.
+          expired_cert:
+            type: integer
+            description: An expired or not yet valid certificate
+              was presented by a client.
+          revoked_cert:
+            type: integer
+            description: A revoked certificate was presented by a client.
+          hostname_mismatch:
+            type: integer
+            description: Server's certificate doesn't match the hostname.
+          other:
+            type: integer
+            description: Other SSL certificate verification errors.
     example:
       handshakes: 79572
       handshakes_failed: 21025
       session_reuses: 15762
+      no_common_protocol: 4
+      no_common_cipher: 2
+      handshake_timeout: 0
+      peer_rejected_cert: 0
+      verify_failures:
+        no_cert: 0
+        expired_cert: 2
+        revoked_cert: 1
+        hostname_mismatch: 2
+        other: 1
   NginxSlabZoneMap:
     title: Slab Zones
     description: |
@@ -2284,6 +2331,7 @@ definitions:
   NginxSlabZone:
     title: Shared memory zone with slab allocator
     description: |
+      Shared memory zone with slab allocator
     type: object
     properties:
       pages:
@@ -2399,6 +2447,16 @@ definitions:
           handshakes: 65432
           handshakes_failed: 421
           session_reuses: 4645
+          no_common_protocol: 4
+          no_common_cipher: 2
+          handshake_timeout: 0
+          peer_rejected_cert: 0
+          verify_failures:
+            no_cert: 0
+            expired_cert: 2
+            revoked_cert: 1
+            hostname_mismatch: 2
+            other: 1
       site2:
         processing: 1
         requests: 185307
@@ -2421,6 +2479,16 @@ definitions:
           handshakes: 104303
           handshakes_failed: 1421
           session_reuses: 54645
+          no_common_protocol: 4
+          no_common_cipher: 2
+          handshake_timeout: 0
+          peer_rejected_cert: 0
+          verify_failures:
+            no_cert: 0
+            expired_cert: 2
+            revoked_cert: 1
+            hostname_mismatch: 2
+            other: 1
   NginxHTTPServerZone:
     title: HTTP Server Zone
     type: object
@@ -2500,6 +2568,40 @@ definitions:
             type: integer
             description: The total number of session reuses during SSL handshake.
             readOnly: true
+          no_common_protocol:
+            type: integer
+            description: The number of SSL handshakes failed
+              because of no common protocol.
+          no_common_cipher:
+            type: integer
+            description: The number of SSL handshakes failed
+              because of no shared cipher.
+          handshake_timeout:
+            type: integer
+            description: The number of SSL handshakes failed
+              because of a timeout.
+          peer_rejected_cert:
+            type: integer
+            description: The number of failed SSL handshakes
+              when nginx presented the certificate to the client
+              but it was rejected with a corresponding alert message.
+          verify_failures:
+            type: object
+            description: SSL certificate verification errors
+            properties:
+              no_cert:
+                type: integer
+                description: A client did not provide the required certificate.
+              expired_cert:
+                type: integer
+                description: An expired or not yet valid certificate
+                  was presented by a client.
+              revoked_cert:
+                type: integer
+                description: A revoked certificate was presented by a client.
+              other:
+                type: integer
+                description: Other SSL certificate verification errors.
     example:
       processing: 1
       requests: 706690
@@ -2522,6 +2624,15 @@ definitions:
         handshakes: 104303
         handshakes_failed: 1421
         session_reuses: 54645
+        no_common_protocol: 4
+        no_common_cipher: 2
+        handshake_timeout: 0
+        peer_rejected_cert: 0
+        verify_failures:
+          no_cert: 0
+          expired_cert: 2
+          revoked_cert: 1
+          other: 1
   NginxHTTPLocationZonesMap:
     title: HTTP Location Zones
     description: |
@@ -2935,6 +3046,14 @@ definitions:
               handshakes: 620311
               handshakes_failed: 3432
               session_reuses: 36442
+              no_common_protocol: 4
+              handshake_timeout: 0
+              peer_rejected_cert: 0
+              verify_failures:
+                expired_cert: 2
+                revoked_cert: 1
+                hostname_mismatch: 2
+                other: 1
             requests: 667231
             header_time: 20
             response_time: 36
@@ -3005,6 +3124,14 @@ definitions:
               handshakes: 620311
               handshakes_failed: 3432
               session_reuses: 36442
+              no_common_protocol: 4
+              handshake_timeout: 0
+              peer_rejected_cert: 0
+              verify_failures:
+                expired_cert: 2
+                revoked_cert: 1
+                hostname_mismatch: 2
+                other: 1
             requests: 667231
             header_time: 20
             response_time: 36
@@ -3113,6 +3240,14 @@ definitions:
               handshakes: 620311
               handshakes_failed: 3432
               session_reuses: 36442
+              no_common_protocol: 4
+              handshake_timeout: 0
+              peer_rejected_cert: 0
+              verify_failures:
+                expired_cert: 2
+                revoked_cert: 1
+                hostname_mismatch: 2
+                other: 1
             max_conns: 20
             requests: 667231
             header_time: 20
@@ -3247,6 +3382,36 @@ definitions:
             type: integer
             description: The total number of session reuses during SSL handshake.
             readOnly: true
+          no_common_protocol:
+            type: integer
+            description: The number of SSL handshakes failed
+              because of no common protocol.
+          handshake_timeout:
+            type: integer
+            description: The number of SSL handshakes failed
+              because of a timeout.
+          peer_rejected_cert:
+            type: integer
+            description: The number of failed SSL handshakes
+              when nginx presented the certificate to the upstream server
+              but it was rejected with a corresponding alert message.
+          verify_failures:
+            type: object
+            description: SSL certificate verification errors
+            properties:
+              expired_cert:
+                type: integer
+                description: An expired or not yet valid certificate
+                  was presented by an upstream server.
+              revoked_cert:
+                type: integer
+                description: A revoked certificate was presented by an upstream server.
+              hostname_mismatch:
+                type: integer
+                description: Server's certificate doesn't match the hostname.
+              other:
+                type: integer
+                description: Other SSL certificate verification errors.
       max_conns:
         type: integer
         description: The
@@ -3558,6 +3723,15 @@ definitions:
           handshakes: 76455
           handshakes_failed: 432
           session_reuses: 28770
+          no_common_protocol: 4
+          no_common_cipher: 2
+          handshake_timeout: 0
+          peer_rejected_cert: 0
+          verify_failures:
+            no_cert: 0
+            expired_cert: 2
+            revoked_cert: 1
+            other: 1
       dns:
         processing: 1
         connections: 155569
@@ -3573,6 +3747,15 @@ definitions:
           handshakes: 2040
           handshakes_failed: 23
           session_reuses: 65
+          no_common_protocol: 4
+          no_common_cipher: 2
+          handshake_timeout: 0
+          peer_rejected_cert: 0
+          verify_failures:
+            no_cert: 0
+            expired_cert: 2
+            revoked_cert: 1
+            other: 1
   NginxStreamServerZone:
     title: Stream Server Zone
     type: object
@@ -3634,6 +3817,40 @@ definitions:
             type: integer
             description: The total number of session reuses during SSL handshake.
             readOnly: true
+          no_common_protocol:
+            type: integer
+            description: The number of SSL handshakes failed
+              because of no common protocol.
+          no_common_cipher:
+            type: integer
+            description: The number of SSL handshakes failed
+              because of no shared cipher.
+          handshake_timeout:
+            type: integer
+            description: The number of SSL handshakes failed
+              because of a timeout.
+          peer_rejected_cert:
+            type: integer
+            description: The number of failed SSL handshakes
+              when nginx presented the certificate to the client
+              but it was rejected with a corresponding alert message.
+          verify_failures:
+            type: object
+            description: SSL certificate verification errors
+            properties:
+              no_cert:
+                type: integer
+                description: A client did not provide the required certificate.
+              expired_cert:
+                type: integer
+                description: An expired or not yet valid certificate
+                  was presented by a client.
+              revoked_cert:
+                type: integer
+                description: A revoked certificate was presented by a client.
+              other:
+                type: integer
+                description: Other SSL certificate verification errors.
     example:
       dns:
         processing: 1
@@ -3650,6 +3867,15 @@ definitions:
           handshakes: 76455
           handshakes_failed: 432
           session_reuses: 28770
+          no_common_protocol: 4
+          no_common_cipher: 2
+          handshake_timeout: 0
+          peer_rejected_cert: 0
+          verify_failures:
+            no_cert: 0
+            expired_cert: 2
+            revoked_cert: 1
+            other: 1
   NginxStreamLimitConnZonesMap:
     title: Stream limit_conns
     description: |
@@ -3698,6 +3924,14 @@ definitions:
               handshakes: 1045
               handshakes_failed: 89
               session_reuses: 321
+              no_common_protocol: 4
+              handshake_timeout: 0
+              peer_rejected_cert: 0
+              verify_failures:
+                expired_cert: 2
+                revoked_cert: 1
+                hostname_mismatch: 2
+                other: 1
             max_conns: 30
             connecions: 1231
             sent: 251946292
@@ -3748,6 +3982,14 @@ definitions:
               handshakes: 5268
               handshakes_failed: 121
               session_reuses: 854
+              no_common_protocol: 4
+              handshake_timeout: 0
+              peer_rejected_cert: 0
+              verify_failures:
+                expired_cert: 2
+                revoked_cert: 1
+                hostname_mismatch: 2
+                other: 1
             max_conns: 30
             connections: 667231
             sent: 251946292
@@ -3814,6 +4056,14 @@ definitions:
               handshakes: 200
               handshakes_failed: 4
               session_reuses: 189
+              no_common_protocol: 4
+              handshake_timeout: 0
+              peer_rejected_cert: 0
+              verify_failures:
+                expired_cert: 2
+                revoked_cert: 1
+                hostname_mismatch: 2
+                other: 1
             max_conns: 50
             connections: 667231
             sent: 251946292
@@ -3925,6 +4175,36 @@ definitions:
             type: integer
             description: The total number of session reuses during SSL handshake.
             readOnly: true
+          no_common_protocol:
+            type: integer
+            description: The number of SSL handshakes failed
+              because of no common protocol.
+          handshake_timeout:
+            type: integer
+            description: The number of SSL handshakes failed
+              because of a timeout.
+          peer_rejected_cert:
+            type: integer
+            description: The number of failed SSL handshakes
+              when nginx presented the certificate to the upstream server
+              but it was rejected with a corresponding alert message.
+          verify_failures:
+            type: object
+            description: SSL certificate verification errors
+            properties:
+              expired_cert:
+                type: integer
+                description: An expired or not yet valid certificate
+                  was presented by an upstream server.
+              revoked_cert:
+                type: integer
+                description: A revoked certificate was presented by an upstream server.
+              hostname_mismatch:
+                type: integer
+                description: Server's certificate doesn't match the hostname.
+              other:
+                type: integer
+                description: Other SSL certificate verification errors.
       max_conns:
         type: integer
         description: The