keep-alive.patch

diff -Naur a/src/http/ngx_http_header_filter_module.c b/src/http/ngx_http_header_filter_module.c
--- a/src/http/ngx_http_header_filter_module.c
+++ b/src/http/ngx_http_header_filter_module.c
@@ -383,7 +383,10 @@ ngx_http_header_filter(ngx_http_request_
         len += sizeof("Connection: upgrade" CRLF) - 1;
 
     } else if (r->keepalive) {
-        len += sizeof("Connection: keep-alive" CRLF) - 1;
+
+        if (r->http_version < NGX_HTTP_VERSION_11 || clcf->keepalive_header) {
+            len += sizeof("Connection: keep-alive" CRLF) - 1;
+        }
 
         /*
          * MSIE and Opera ignore the "Keep-Alive: timeout=<N>" header.
@@ -556,8 +559,11 @@ ngx_http_header_filter(ngx_http_request_
                              sizeof("Connection: upgrade" CRLF) - 1);
 
     } else if (r->keepalive) {
-        b->last = ngx_cpymem(b->last, "Connection: keep-alive" CRLF,
-                             sizeof("Connection: keep-alive" CRLF) - 1);
+
+        if (r->http_version < NGX_HTTP_VERSION_11 || clcf->keepalive_header) {
+            b->last = ngx_cpymem(b->last, "Connection: keep-alive" CRLF,
+                                 sizeof("Connection: keep-alive" CRLF) - 1);
+        }
 
         if (clcf->keepalive_header) {
             b->last = ngx_sprintf(b->last, "Keep-Alive: timeout=%T" CRLF,