dns: tweak regex for IPv6 addresses

lpinca · MylesBorins · commit 0b87b1a0958c · 2016-10-26T14:09:18.000-04:00
The regex used in `dns.setServers()` to match IPv6 addresses in square brackets uses a capturing group for the port but this info is not needed. This commit replaces the capturing group with a non capturing one. Ref: #8965 PR-URL: #8665 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Ilkka Myller <ilkka.myller@nodefield.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Prince John Wesley <princejohnwesley@gmail.com> Reviewed-By: Michaël Zasso <targos@protonmail.com>
diff --git a/lib/dns.js b/lib/dns.js
@@ -292,7 +292,7 @@ exports.setServers = function(servers) {
     if (ver)
       return newSet.push([ver, serv]);
 
-    var match = serv.match(/\[(.*)\](:\d+)?/);
+    var match = serv.match(/\[(.*)\](?::\d+)?/);
 
     // we have an IPv6 in brackets
     if (match) {
