Resend (partial) of my CIP v4.4 backport patches for m68k. This series only contains patches 4 and 5 of the previous series (Al Viro's signal handling fixes) - everything else appears to have been applied in the meantime, or isn't really a bugfix. These patches need merge conflict fixes and are not suitable for cherry-picking from v4.19.y. Tested on 60830 (Atari Falcon) Cheers, Michael
