FHS compatibility for daemontools/runit

[Wayne Marshall <wcm@guinix.com>]

It is trivial to obtain FHS compatibility with daemontools/runit.

1) Install service definitions on /var, e.g.:

  /var/service.d/

2) Setup the service activation directory in /etc, e.g.:

  /etc/service/

3) Configure startup of svscan/runsvdir to monitor the service
activation directory, /etc/service.

4) To activate a service, symlink its service definition
directory into the service activation directory:

  # cd /etc/service
  # ln -s /var/service.d/qmail-start

That's all there is to it.  All run-time files are created and
maintained on /var, the root partition may be mounted read-only
(after making service activation symlinks), it is both possible
and sensible to keep multilogs within each respective service
definition directory, and no other symlink gymnastics are
required.

For pure djb compatibility, symlink /service --> /etc/service.

Wayne