Bug#1072914: xdg-terminal-exec: [Debdiff] Run upstream tests and provide manual page.

[Jeremy Bícha]

Thank you very much for adding the build test override and
autopkgtests. I have applied those improvements with minor tweaks.

Could you please forward the manpage upstream? I consider a missing
manpage to usually be a fairly minor Debian bug but I'd be happy to
cherry-pick that after it is accepted upstream.

Anyway, the manpage is a separate fix from the tests so in the future
I encourage you to split it into a separate commit or merge request
(or Debian bug).

Jeremy Bícha