captures support in server_name
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index cd7159e..ad00946 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -2819,6 +2819,7 @@
 
 #if (NGX_PCRE)
         sn->regex = NULL;
+        sn->captures = 0;
 #endif
         sn->core_srv_conf = conf;
         sn->name.len = conf->server_name.len;
@@ -3420,6 +3421,7 @@
 
 #if (NGX_PCRE)
         sn->regex = NULL;
+        sn->captures = 0;
 #endif
         sn->core_srv_conf = cscf;
         sn->name = value[i];
@@ -3446,6 +3448,7 @@
             return NGX_CONF_ERROR;
         }
 
+        sn->captures = (ngx_regex_capture_count(sn->regex) > 0);
         sn->name = value[i];
         }
 #else