add /user/<uid> and /post/<pid> redirects

change notifications to use new redirects

src/socket.io/user.js

@@ -155,7 +155,7 @@ SocketUser.follow = function(socket, data, callback) {
 				bodyShort: '[[notifications:user_started_following_you, ' + userData.username + ']]',
 				nid: 'follow:' + data.uid + ':uid:' + socket.uid,
 				from: socket.uid,
-				path: '/user/' + userData.userslug,
+				path: '/user/' + socket.uid,
 				mergeId: 'notifications:user_started_following_you'
 			}, next);
 		},