Always show 341 RPL_INVITING

At least in InspIRCd's implementation, you only get invite-notify
INVITEs if you are op, so inviting with no op (where allowed by a
channel mode) results in only a 341. On the other hand, inviting
as an op produces both a 341 and an INVITE, so will be displayed
twice, but showing something sometimes twice is better than not
showing it at all.

handle.c

@@ -498,7 +498,6 @@ static void handleInvite(struct Message *msg) {
 
 static void handleReplyInviting(struct Message *msg) {
 	require(msg, false, 3);
-	if (self.caps & CapInviteNotify) return;
 	struct Message invite = {
 		.nick = self.nick,
 		.user = self.user,