MFC r283573, r283574, r283575, r283576, r283580, r283593, r283618:
r283573:
Remove a continuation on error, since the relevant behavior can only occur if a particular file exists.
r283574:
Set STAGE_TARGETS only if RELEASEDIR exists.
r283575:
Remove duplicate exists() sanity check.
r283576:
Reindent after previous commit.
r283580:
Use SVNREVISION and BUILDDATE if passed into the make(1) environment, fallback to trying to figure it out otherwise.
r283593:
Fix a typo in a comment.
r283618:
Invert the build date and svn revision to match the namimg convention that has been in use for a while.
Sponsored by: The FreeBSD Foundation