[Reviewers] FYI: Phabricator experiment

[Augie Fackler]

Howdy reviewers,

Aaron and Durham (cc'd) have expressed a feeling that we'd get a lot more reviewer contribution from Facebook employees if we had an option other than review-by-email. I'm more than a little dubious that it'll make a big difference, but in the name of collecting data we agreed to set up a Phabricator instance and try that out, at least for changes that don't require multiple patches[0]. Keeping an eye on it will, of course, be optional, but I'd like it if everyone at least kept an eye out for it when it's ready and gave it a fair examination, so that in a month or two we can decide if the experiment should be continued.

Thanks,
Augie

0: Nobody knows how well the upstream stack of patches review tooling works, since I guess Facebook has some internal customizations. It sounds like Mozilla will likely spur some improvement in that area soon, though not soon enough for us to want to block this experiment on that.