nginx 0.1.16 *) Bugfix: if the response were transferred by chunks, then on the HEAD request the final chunk was issued. *) Bugfix: the "Connection: keep-alive" header were issued, even if the keepalive_timeout directive forbade the keep-alive use. *) Bugfix: the errors in the ngx_http_fastcgi_module caused the segmentation faults. *) Bugfix: the compressed response encrypted by SSL may not transferred complete. *) Bugfix: the TCP-specific TCP_NODELAY, TCP_NOPSUH, and TCP_CORK options, are not used for the unix domain sockets. *) Feature: the rewrite directive supports the arguments rewriting. *) Bugfix: the response code 400 was returned for the POST request with the "Content-Length: 0" header; bug appeared in 0.1.14.

--- a/src/os/unix/ngx_channel.c
+++ b/src/os/unix/ngx_channel.c
@@ -38,6 +38,8 @@ ngx_int_t ngx_write_channel(ngx_socket_t
         *(int *) CMSG_DATA(&cmsg.cm) = ch->fd;
     }
 
+    msg.msg_flags = 0;
+
 #else
 
     if (ch->fd == -1) {
@@ -58,7 +60,6 @@ ngx_int_t ngx_write_channel(ngx_socket_t
     msg.msg_namelen = 0;
     msg.msg_iov = iov;
     msg.msg_iovlen = 1;
-    msg.msg_flags = 0;
 
     n = sendmsg(s, &msg, 0);