- add standard rc.subr startup script.
- add post-install message mentioning necessary configuration steps.
- move pid-file to /var/run, the usual place. Do setuid/setgid later,
so that we can create it.
- make message about stale pid file a bit more explanatory.
This is a PXE daemon, which you can use to set up a networked boot menu
for netbooting client machines (FreeBSD, Linux, Windows, etc.) that
support & utilize Intel's Preboot eXecution Environment (PXE).
