Fix joinModes, and use it in protocol/inspircd's joinClient

In short, PyLink should be sending FJOINs to channels with the modes that it already has (or what we believe it has). This prevents clearing mode lists when PyLink's channel TS is slightly earlier than the IRCd's.

protocols/inspircd.py

@@ -54,8 +54,9 @@ def joinClient(irc, client, channel):
     if not utils.isChannel(channel):
         raise ValueError('Invalid channel name %r.' % channel)
     # One channel per line here!
-    _sendFromServer(irc, server, "FJOIN {channel} {ts} + :,{uid}".format(
-            ts=int(time.time()), uid=client, channel=channel))
+    _sendFromServer(irc, server, "FJOIN {channel} {ts} {modes} :,{uid}".format(
+            ts=int(time.time()), uid=client, channel=channel,
+            modes=utils.joinModes(irc.channels[channel].modes)))
     irc.channels[channel].users.add(client)
 
 def partClient(irc, client, channel, reason=None):

utils.py

@@ -195,10 +195,12 @@ def joinModes(modes):
     args = []
     for modepair in modes:
         mode, arg = modepair
-        modelist += mode[1]
+        modelist += mode
         if arg is not None:
             args.append(arg)
-    s = '+%s %s' % (modelist, ' '.join(args))
+    s = '+%s' % modelist
+    if args:
+        s += ' %s' % ' '.join(args)
     return s
 
 def isInternalClient(irc, numeric):