Added very basic mocks for net and dns

Author: jondlm

mock/dns.js

@@ -0,0 +1,15 @@
+exports.lookup = exports.resolve4 =
+exports.resolve6 = exports.resolveCname =
+exports.resolveMx = exports.resolveNs =
+exports.resolveTxt = exports.resolveSrv =
+exports.resolveNaptr = exports.reverse =
+exports.resolve =
+function () {
+  if (!arguments.length) return;
+
+  var callback = arguments[arguments.length - 1];
+  if (callback && typeof callback === 'function') {
+    callback(null, '0.0.0.0')
+  }
+}
+

mock/net.js

@@ -0,0 +1,10 @@
+exports.createServer =
+exports.createConnection =
+exports.connect =
+function () {};
+
+exports.isIP =
+exports.isIPv4 =
+exports.isIPv6 =
+function () { return true };
+