License Your Mozilla Tests Under CC0!

[fantasai]

Mozilla just announced that all tests and related resources will be available
as public domain going forward and retro-actively for all tests for which
they own the copyright.

However, there's a lot of contributors here who own their own copyrights on
tests, and would need to license separately! Also, a lot of Mozilla employees
and contractors contribute under their non-mozilla.com accounts (which makes
it hard to tell they're covered) or have made test contributions before/after
working for Mozilla (which are not covered).

Therefore Gerv created a registry in Bugzilla: to relicense your contributions,
or to clarify that your contributions are in fact covered, copy-paste his legal
text, and put it in a comment in bug 1073556.
https://bugzilla.mozilla.org/show_bug.cgi?id=1073556

Easy peasy. Just don't forget to uncheck the CC box. :)

Follow-ups to m.legal.

~fantasai