Release snapshot creation Q&A.

[Michael Stone]

Ed pointed out to me that I used a bit of jargon, 'release snapshot',
which I had not formerly introduced. By 'release snapshot', I mean a
build in a release stream (e.g. 8.2, rather than joyride) which is in
danger of becoming a release candidate should testing go well. To first
order, (signed) release candidates are builds which we would be willing
to ship under duress. Candidates become official when they ship.

Michael