Upstream: fixed "no port" detection in evaluated upstreams.

If an upstream with variables evaluated to address without a port,
then instead of a "no port in upstream" error an attempt was made
to connect() which failed with EADDRNOTAVAIL.
diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index 1933509..e9224e2 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -1015,10 +1015,11 @@
 
     } else {
         u->resolved->host = url.host;
-        u->resolved->port = (in_port_t) (url.no_port ? port : url.port);
-        u->resolved->no_port = url.no_port;
     }
 
+    u->resolved->port = (in_port_t) (url.no_port ? port : url.port);
+    u->resolved->no_port = url.no_port;
+
     return NGX_OK;
 }