bot: Try to reconnect after disconnect.

forwardxmpp/__main__.py

@@ -45,7 +45,6 @@ def main(arglist=None, stdout=sys.stdout, stderr=sys.stderr):
     if not config.ready():
         return 3
     bot = bot_mod.ForwardBot(config)
-    bot.connect()
     bot.process()
     return 0
 

forwardxmpp/bot.py

@@ -28,9 +28,21 @@ class ForwardBot(slixmpp.ClientXMPP):
             self.register_plugin(xep.value)
             setattr(self, xep.name.lower(), self.plugin[xep.value])
 
+        self.add_event_handler('disconnected', self.handle_disconnected)
+        self.add_event_handler('connection_failed', self.handle_connection_failed)
         self.add_event_handler('session_start', self.handle_start)
         self.add_event_handler('forward::queryhost', self.handle_queryhost)
         self.add_event_handler('message', self.handle_message)
+        self.event('disconnected')
+
+    async def handle_disconnected(self, data=None):
+        self.connect()
+
+    async def handle_connection_failed(self, error):
+        # If the connection isn't going to be retried, or if the retry has
+        # gotten excessive, give up.
+        if not (0 < self.connect_loop_wait < self.max_retry_wait):
+            self.loop.stop()
 
     async def handle_start(self, event):
         self.send_presence()