Our main version string is designed for release engineering purposes:
it matches file name conventions used for versioned tarballs and the
versions sort lexicographically while containing all pertinent
information.
With this commit we add in parentheses a more human-friendly rendering
of the version string: we spell out the meaning of each field and
render the datetime in RFC 822 notation.
We believe there may be a race condition in bootstrap.sh when run with
-j. We know that running it without -j should be at least
deterministic (whether or not correct), so we'll go with that in
anticipation of releasing v1.2.
