r3117, r3123, r3229 merge: server name related merges: *) If .domain.com, .sub.domain.com, and .domain-some.com were defined, then .sub.domain.com was matched by .domain.com: wildcard names hash was built incorrectly due to sorting order issue of "." vs "-". They were sorted as com.domain com.domain-some com.domain.sub while they should be sorted as com.domain com.domain.sub com.domain-some for correct hash building *) test space between "~" and regex in server_name and invalid_referers *) do not run regex for empty host name since regex always fails in this case, the bug had been introduced in r2196

--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -1658,7 +1658,7 @@ ngx_http_find_virtual_server(ngx_http_re
 
 #if (NGX_PCRE)
 
-    if (r->virtual_names->nregex) {
+    if (len && r->virtual_names->nregex) {
         size_t                   ncaptures;
         ngx_int_t                n;
         ngx_uint_t               i;