MFC r257805, r257806, r257807, r257942:
r257805:
Add a 'mini-memstick.img' release target, which will use the
'bootonly.iso' components to create a smaller memory stick image.
This is useful for system recovery, where a full memstick.img image
is not necessarily needed (or wanted). In addition, it is possible
to do bootonly-style installation, where the base.txz, kernel.txz,
etc. are fetched from a remote source.
Provide backwards-compatible target (mini-memstick), to keep in sync
with the targets documented in release/Makefile.
r257806:
Remove extra target from 'memstick' that I forgot to remove before
previous commit.
r257807:
Update release(7) to include 'mini-memstick'.
r257942:
Fix a few style nits.
Sponsored by: The FreeBSD Foundation
git-svn-id: svn://svn.freebsd.org/base/stable/10@259225
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