test-archive: silence stupid messages from GNU tar
Recent versions of GNU tar have apparently decided they're old enough
that it's ok for them to prattle on senselessly about things no one
cares about without anyone objecting. We object; apply duct tape.
% inserve
A dir/c
? a
? dir/b
? hg.pid
% moving dir out
% status
! dir/c
? a
? hg.pid
Are we able to kill the service? if not, the service died on some error