Log Message:
New package, sysutils/runit. From wip.

This has been in wip for many years, various people have added updates
and are presumably using it. Time to pull it into the main repo.

runit is a cross-platform Unix init scheme with service supervision,
a replacement for sysvinit, and other init schemes. It runs on
GNU/Linux, *BSD, MacOSX, Solaris, and can easily be adapted to
other Unix operating systems.