While it isn't clear why this patch helps, it doesn't seem to have any negative
effects, so let's include it for now...

Otherwise, telnet login is allowed by default when neither a password nor SSH
keys are configured.

This significantly improves fastd performance, to the level it was before
Barrier Breaker.

This now includes the previously added patch.

Besides other issues, this should fix an integer overflow breaking IPv6 address
aquisition after a runtime of 50 days.

This also removes our mac80211 backport for now, as the version found in
Attitude Adjustment is up-to-date.