r272436, r272437, r272792:
r272436:
Remove the first argument to panic(), which was initially
intended to be the exit code, however when a non-zero exit
code was returned to release/Makefile, this would prevent
any remaining (and possibly successful) stages from being
attempted.
r272437:
If the vm-base target fails, prevent the vm-image target
from being run since it cannot possibly succeed.
r272792:
Add /usr/local/bin and /usr/local/sbin to PATH, needed
if third-party software needs to use utilities outside
of the base system during post-install stages (indexinfo
is one culprit).
MFC after: 3 days
X-MFC-10.1: yes
Sponsored by: The FreeBSD Foundation
7cb62648d9