net: remove implicit setting of DNS hints

This commit removes the implicit setting of the V4MAPPED and
ADDRCONFIG DNS flags in createConnection(). As of
39de601e1c, users that need these
flags can set them explicitly.

PR-URL: https://github.com/nodejs/node/pull/6021
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

lib/net.js

@@ -949,17 +949,6 @@ function lookupAndConnect(self, options) {
     hints: options.hints || 0
   };
 
-  if (dnsopts.family !== 4 && dnsopts.family !== 6 && dnsopts.hints === 0) {
-    dnsopts.hints = dns.ADDRCONFIG;
-    // The AI_V4MAPPED hint is not supported on FreeBSD or Android,
-    // and getaddrinfo returns EAI_BADFLAGS. However, it seems to be
-    // supported on most other systems. See
-    // http://lists.freebsd.org/pipermail/freebsd-bugs/2008-February/028260.html
-    // for more information on the lack of support for FreeBSD.
-    if (process.platform !== 'freebsd' && process.platform !== 'android')
-      dnsopts.hints |= dns.V4MAPPED;
-  }
-
   debug('connect: find host ' + host);
   debug('connect: dns options', dnsopts);
   self._host = host;