I'm thinking I'd like to impose a PATH for running @exec/@unexec
style lines in packing-lists.
Some people have their default path ignoring /usr/local, which is just
fine, but the packages expect things to run in a "correct" way, so currently
any local command requires /usr/local/bin/cmd to be run (and does that).
setting PATH explicitly to
/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11R6/bin:${LOCALBASE}/bin:${LOCALBASE}/sbin
before running @exec/@unexec would allow for reproducibility in package
installations, and simplify some of the command lines.
