Re: git: 67783db661f8 - main - CONTRIBUTING: request only one submission type per change

Ed Maste:
> +A change should be submitted by only one method.  For example, please do not
> +open a GitHub pull request and create a Phabricator review for the same change
> +(unless explicitly requested to do so by a FreeBSD committer).

as a non-committer src contributor, i've discussed this with imp@ quite
a bit and i think this should be phrased more strongly in favour of
using GitHub for commits.

the current situation is that Phabricator is useless for non-committers
because 1) you have to know who can review your commit, and 2) once your
commit is reviewed, someone has to commit it, and Phabricator doesn't
address this.

i think it might make more sense to suggest that people submit all
patches via either GitHub or Bugzilla, and only use Phabricator if
specifically asked to.