GCC bugzilla: REST API

[Frank Ch. Eigler]

Hi -

> I'm working on a script that will catch the missing email into
> Bugzilla that are triggered by git commits mentioning a PR.
> For that I would need the enablement of REST API that was enabled
> in previous bugzilla instance.

I believe this should work now.  Thanks to Joseph Myers for
pointing out that we were missing some more perl modules.
Fought with koji & etc. awhile and now bugzilla's checksetup.pl
is happy all around.

- FChE