Bug#839253: (no subject)
A couple of small decisions in discussion w/Martin:
* If you have `Tests: foo` and `Features: test-name=bar`, warn and ignore the
* If you have multiple test-name features, e.g.
`Features: test-name=a, test-name=b`
warn and skip.
* I want the feature name to match the command line option, but inconsistent
with the other autopkgtest options, we have --testname. For consistency,
this should be called --test-name, so let's support --test-name as an alias
and deprecate --testname, with eventual hiding and/or removal some time