Hi,

with --ignore-restrictions I can run tests that would normally be
skipped because of a restriction. I now want the opposite.

For example, when I have a small number of tests that need
isolation-machine, I might only want to run THESE tests under qemu and
the others in unshare. I'd like to have an option like
--only-restrictions to be able to use autopkgtest 
--only-restrictions=isolation-machine -- qemu after an autopkgtest -- 
unshare.

Greetings
Marc