bugfix: patch listening socket breaks binary upgrade

patches/nginx-1.13.6-socket_cloexec.patch

@@ -30,48 +30,6 @@ index 10835f6c..b5b33bb3 100644
 +                  fd = socket(AF_INET, SOCK_STREAM, 0);
 +                  fcntl(fd, F_SETFD, FD_CLOEXEC);"
 +. auto/feature
-diff --git a/src/core/ngx_connection.c b/src/core/ngx_connection.c
-index 9a747589..3c0a90c5 100644
---- a/src/core/ngx_connection.c
-+++ b/src/core/ngx_connection.c
-@@ -450,8 +450,15 @@ ngx_open_listening_sockets(ngx_cycle_t *cycle)
-                 continue;
-             }
- 
-+#if (NGX_HAVE_SOCKET_CLOEXEC)
-+            s = ngx_socket(ls[i].sockaddr->sa_family,
-+                           ls[i].type | SOCK_CLOEXEC, 0);
-+
-+#else
-             s = ngx_socket(ls[i].sockaddr->sa_family, ls[i].type, 0);
- 
-+#endif
-+
-             if (s == (ngx_socket_t) -1) {
-                 ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
-                               ngx_socket_n " %V failed", &ls[i].addr_text);
-@@ -536,6 +543,21 @@ ngx_open_listening_sockets(ngx_cycle_t *cycle)
-                 }
-             }
- 
-+#if (NGX_HAVE_FD_CLOEXEC)
-+            if (ngx_cloexec(s) == -1) {
-+                ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
-+                              ngx_cloexec_n " %V failed", &ls[i].addr_text);
-+
-+                if (ngx_close_socket(s) == -1) {
-+                    ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,
-+                                  ngx_close_socket_n " %V failed",
-+                                  &ls[i].addr_text);
-+                }
-+
-+                return NGX_ERROR;
-+            }
-+#endif
-+
-             ngx_log_debug2(NGX_LOG_DEBUG_CORE, log, 0,
-                            "bind() %V #%d ", &ls[i].addr_text, s);
- 
 diff --git a/src/core/ngx_resolver.c b/src/core/ngx_resolver.c
 index cd55520c..438e0806 100644
 --- a/src/core/ngx_resolver.c