overrides/override-{a1,other}.txt: weekly batch of override updates

overrides/override-{a1,other}.txt: weekly batch of override updates

Overrides have been handed in as more or less atomic changes with
separate patches or patchsets. Given the volatility of those, this
approach does not seem to be worth the effort any more, which is why
this patch introduces weekly (?) batching of those changes in one big
patch.

The contents of overrides have been researched with caution, sometimes
even exhaustively, which is why they are considered to be safe to be
applied en bloc.

Cc: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>