Remove superfluous nextTick during server binding

This breaks fork().send({}, server._handle) after server.listen() because
server._handle is not set.

lib/net.js

@@ -692,9 +692,7 @@ function listen(self, address, port, addressType) {
       self._listen2(address, port, addressType);
     });
   } else {
-    process.nextTick(function() {
-      self._listen2(address, port, addressType);
-    });
+    self._listen2(address, port, addressType);
   }
 }