Add a /password command in the RosterTab

Thanks to Florob for the initial input

doc/source/commands.rst

@@ -440,6 +440,11 @@ Roster tab commands
 
         Set the given JID’s name in your roster.
 
+    /password
+        **Usage:** ``/password <password>``
+
+        Change your password.
+
     /groupadd
         **Usage:** ``/groupadd <jid> <group>``
 

src/connection.py

@@ -68,7 +68,10 @@ class Connection(sleekxmpp.ClientXMPP):
         self.register_plugin('xep_0045')
         self.register_plugin('xep_0048')
         self.register_plugin('xep_0060')
+        self.register_plugin('xep_0066')
         self.register_plugin('xep_0071')
+        self.register_plugin('xep_0077')
+        self.plugin['xep_0077'].create_account = False
         self.register_plugin('xep_0085')
         self.register_plugin('xep_0115')
         self.register_plugin('xep_0191')

src/tabs.py

@@ -2273,6 +2273,10 @@ class RosterInfoTab(Tab):
                 desc=_('Informs you of the last activity of a JID.'),
                 shortdesc=_('Get the activity of someone.'),
                 completion=self.core.completion_last_activity)
+        self.register_command('password', self.command_password,
+                usage='<password>',
+                shortdesc=_('Change your password'))
+
         self.resize()
         self.update_commands()
         self.update_keys()
@@ -2465,6 +2469,21 @@ class RosterInfoTab(Tab):
         self.core.information_win.rebuild_everything(self.core.information_buffer)
         self.refresh()
 
+    def command_password(self, arg):
+        """
+        /password <password>
+        """
+        def callback(iq):
+            if iq['type'] == 'result':
+                self.core.information('Password updated', 'Account')
+                if config.get('password', ''):
+                    config.silent_set('password', arg)
+            else:
+                self.core.information('Unable to change the password', 'Account')
+        self.core.xmpp.plugin['xep_0077'].change_password(arg, callback=callback)
+
+
+
     def command_deny(self, arg):
         """
         /deny [jid]