[PATCH] xkb: Fix ISOLock

[wettstein509 at solnet.ch]

> This is complex enough that I can't say off the top of my head it's
> exactingly correct. Probably the best thing to do would be to get a
> similar patch with testcases into xkbcommon, so we can verify that it
> works, and also doesn't break other functionality.

Unfortunately, I do not know enough about xkbcommon to do that.  I am
not even sure it is supported on NetBSD, which is my work environment.

Does xkbcommon allow non-interactive testing?  For my purposes, I put
ISOLock with various 'affect' settings on a function key and then tried
the various interactions with modifier, group, control, and button
actions.  But admittedly this is tedious and error-prone.

Andreas