nginx 1.1.4 *) Feature: the ngx_http_upstream_keepalive module. *) Feature: the "proxy_http_version" directive. *) Feature: the "fastcgi_keep_conn" directive. *) Feature: the "worker_aio_requests" directive. *) Bugfix: if nginx was built --with-file-aio it could not be run on Linux kernel which did not support AIO. *) Bugfix: in Linux AIO error processing. Thanks to Hagai Avrahami. *) Bugfix: reduced memory consumption for long-lived requests. *) Bugfix: the module ngx_http_mp4_module did not support 64-bit MP4 "co64" atom.

--- a/auto/modules
+++ b/auto/modules
@@ -344,6 +344,11 @@ if [ $HTTP_UPSTREAM_IP_HASH = YES ]; the
     HTTP_SRCS="$HTTP_SRCS $HTTP_UPSTREAM_IP_HASH_SRCS"
 fi
 
+if [ $HTTP_UPSTREAM_KEEPALIVE = YES ]; then
+    HTTP_MODULES="$HTTP_MODULES $HTTP_UPSTREAM_KEEPALIVE_MODULE"
+    HTTP_SRCS="$HTTP_SRCS $HTTP_UPSTREAM_KEEPALIVE_SRCS"
+fi
+
 if [ $HTTP_STUB_STATUS = YES ]; then
     have=NGX_STAT_STUB . auto/have
     HTTP_MODULES="$HTTP_MODULES ngx_http_stub_status_module"