Permit connecting with an alternative authcid

This permits imitation of other users (for example, if usera@example.com is allowed to create a session as userb@example.com, he will provide the JID userb@example.com in <stream:stream to="..." and <bind/>, but use his own credentials in the the <auth/> packet per SASL's separation of authzid and authcid.

bower.json

@@ -32,9 +32,12 @@
   ],
   "dependencies": {
     "jquery": "~1.11.0",
-    "strophe": "strophe/strophejs#1.2.1",
+    "strophe": "strophe/strophejs#72914b87f56cf12e5e6a40c293cb9c6397bc7d16",
     "strophejs-plugins": "strophe/strophejs-plugins#39d67d66e900bce8b990d9214bffe6593a96ddf7",
     "mustache": "0.3.0",
     "jquery-i18n": "1.1.1"
+  },
+  "resolutions": {
+    "strophe": "72914b87f56cf12e5e6a40c293cb9c6397bc7d16"
   }
 }

src/core.js

@@ -261,8 +261,9 @@ Candy.Core = (function(self, Strophe, $) {
 	 *   (String) password  - Password of the user
 	 *   (String) nick      - Nick of the user. Set one if you want to anonymously connect but preset a nick. If jidOrHost is a domain
 	 *                        and this param is not set, Candy will prompt for a nick.
+	 *   (String) authcid   - Authentication identity (username) if different from the JID.
 	 */
-	self.connect = function(jidOrHost, password, nick) {
+	self.connect = function(jidOrHost, password, nick, authcid) {
 		// Reset before every connection attempt to make sure reconnections work after authfail, alltabsclosed, ...
 		_connection.reset();
 		self.registerEventHandlers();
@@ -291,7 +292,7 @@ Candy.Core = (function(self, Strophe, $) {
 			}
 
 			// authentication
-			_connection.connect(_getEscapedJidFromJid(jidOrHost) + '/' + _options.resource, password, Candy.Core.Event.Strophe.Connect);
+			_connection.connect(_getEscapedJidFromJid(jidOrHost) + '/' + _options.resource, password, Candy.Core.Event.Strophe.Connect, undefined, undefined, undefined, authcid);
 			if (nick) {
 				_user = new self.ChatUser(jidOrHost, nick);
 			} else {