linkchecker: whitelist broken link
@@ -30,6 +30,7 @@ https://cgit.kde.org/kconfig.git
https://doc.libelektra.org/coverage/master/debian-buster-full
https://oyranos.org
https://www.openicc.info/index.php%3Ftitle=OpenICC_Configuration_0.1.html
+https://cfp.linuxwochen.at/de/LWW18/public/events/798
# Wrongly detected as broken, even though its online
https://crates.io/crates/elektra
