init: Add more verbose comment block

There has been some confusion around the usage model of the init
system. Add a comment block to hopefully limit the confusion. This
should not be construed to replace the documentation that has yet to
be written for the init subsystem.

Change-Id: I4df67f056b29b88ce6f0b8c2376deaf022cb8d84
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
1 file changed