Simplify SASL mech registration.

Moved SASL registration completely to the feature plugin, instead of
keeping a portion of it in ClientXMPP.

sleekxmpp/features/feature_mechanisms/mechanisms.py

@@ -51,7 +51,7 @@ class feature_mechanisms(base_plugin):
                 restart=True,
                 order=self.config.get('order', 100))
 
-    def register_mechanism(self, name, handler, priority=0):
+    def register(self, name, handler, priority=0):
         """
         Register a handler for a SASL authentication mechanism.
 
@@ -70,7 +70,7 @@ class feature_mechanisms(base_plugin):
         self._mechanism_priorities.append((priority, name))
         self._mechanism_priorities.sort(reverse=True)
 
-    def remove_mechanism(self, name):
+    def remove(self, name):
         """
         Remove support for a given SASL authentication mechanism.
 

sleekxmpp/features/sasl_anonymous.py

@@ -14,8 +14,9 @@ class sasl_anonymous(base_plugin):
         self.name = 'SASL ANONYMOUS'
         self.rfc = '6120'
         self.description = 'SASL ANONYMOUS Mechanism'
+        self.stanza = self.xmpp['feature_mechanisms'].stanza
 
-        self.xmpp.register_sasl_mechanism('ANONYMOUS',
+        self.xmpp['feature_mechanisms'].register('ANONYMOUS',
                 self._handle_anonymous,
                 priority=self.config.get('priority', 0))
 
@@ -23,7 +24,7 @@ class sasl_anonymous(base_plugin):
         if self.xmpp.boundjid.user:
             return False
 
-        resp = self.xmpp['feature_sasl'].stanza.Auth(self.xmpp)
+        resp = self.stanza.Auth(self.xmpp)
         resp['mechanism'] = 'ANONYMOUS'
         resp.send(now=True)
 

sleekxmpp/features/sasl_plain.py

@@ -14,8 +14,9 @@ class sasl_plain(base_plugin):
         self.name = 'SASL PLAIN'
         self.rfc = '6120'
         self.description = 'SASL PLAIN Mechanism'
+        self.stanza = self.xmpp['feature_mechanisms'].stanza
 
-        self.xmpp.register_sasl_mechanism('PLAIN',
+        self.xmpp['feature_mechanisms'].register('PLAIN',
                 self._handle_plain,
                 priority=self.config.get('priority', 1))
 
@@ -33,7 +34,7 @@ class sasl_plain(base_plugin):
         auth = base64.b64encode(b'\x00' + user + \
                                 b'\x00' + password).decode('utf-8')
 
-        resp = self.xmpp['feature_mechanisms'].stanza.Auth(self.xmpp)
+        resp = self.stanza.Auth(self.xmpp)
         resp['mechanism'] = 'PLAIN'
         resp['value'] = auth
         resp.send(now=True)