Keep a list of CAP capabilities in IRCServer

IRCLineHandler.py

@@ -283,9 +283,12 @@ class LineHandler(object):
                 event["server"].send_capability_queue()
             else:
                 event["server"].send_capability_end()
-        elif subcommand == "ack" or subcommand == "nack":
+        elif subcommand == "ack":
             if not event["server"].waiting_for_capabilities():
                 event["server"].send_capability_end()
+            event["server"].capabilities = set(capabilities)
+        elif subcommand == "ack" or subcommand == "nack":
+            event["server"].send_capability_end()
 
     # the server is asking for authentication
     def authenticate(self, event):

IRCServer.py

@@ -26,8 +26,10 @@ class Server(object):
         self.original_username = username or nickname
         self.original_realname = realname or nickname
         self.name = None
+
         self._capability_queue = set([])
         self._capabilities_waiting = set([])
+        self.capabilities = set([])
 
         self.write_buffer = b""
         self.buffered_lines = []