*) refactor ngx_parse_inet_url()
*) refactor ngx_parse_unix_domain_url()
*) delete unused ngx_url_t fields

src/http/modules/ngx_http_proxy_module.c

diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index cf56054..b69272d 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -2546,7 +2546,7 @@
 ngx_http_proxy_set_vars(ngx_pool_t *pool, ngx_url_t *u,
     ngx_http_proxy_vars_t *v)
 {
-    if (!u->unix_socket) {
+    if (u->family != AF_UNIX) {
         if (u->no_port || u->port == u->default_port) {
             v->host_header = u->host;