always run regex in server_name to get captures for IPv6 addresses,
the same fix for IPv4 addresses has been made in r2584
diff --git a/src/http/ngx_http.c b/src/http/ngx_http.c
index 9ca52b9..5ca9fed 100644
--- a/src/http/ngx_http.c
+++ b/src/http/ngx_http.c
@@ -1871,7 +1871,11 @@
&& (addr[i].wc_head == NULL
|| addr[i].wc_head->hash.buckets == NULL)
&& (addr[i].wc_tail == NULL
- || addr[i].wc_tail->hash.buckets == NULL))
+ || addr[i].wc_tail->hash.buckets == NULL)
+#if (NGX_PCRE)
+ && addr[i].nregex == 0
+#endif
+ )
{
continue;
}