Properly store our clients internal channel status's and burst them if needed.

Also made Flag::HasFlag use test() instead of operator[] to catch errors, and fixed an out of bounds access to a
Flags
bitset causing crashes on some systems.

src/bots.cpp

@@ -183,7 +183,7 @@ void BotInfo::Join(Channel *c, bool update_ts)
 	}
 	if (!update_ts)
 		ircdproto->SendJoin(this, c->name, c->creation_time);
-	else
+	else if (Me && Me->IsSynced())
 	{
 		ircdproto->SendJoin(this, cc);