Don't disable abort (Ctrl-C) for QWK logons.

src/sbbs3/logon.cpp

@@ -218,7 +218,7 @@ bool sbbs_t::logon()
 	sprintf(str,"%smsgs/n%3.3u.ixb",cfg.data_dir,cfg.node_num);
 	remove(str);			/* remove any pending node message indices */
 
-	if(!SYSOP && online==ON_REMOTE) {
+	if(!SYSOP && online==ON_REMOTE && !qwklogon) {
 		rioctl(IOCM|ABORT);	/* users can't abort anything */
 		rioctl(IOCS|ABORT); 
 	}