[PATCH] make logging a config option

Once again, patch to make logging a config option.

Reason for this (since you asked for it):
 - In our setup it is easy (although still annoying) .. just edit the
   ebuild, add logging support (or remove it) and rebuild.  For say a
   binary distro, having the logging is useful for debugging some
   times, but its more a once of, or rare thing, as you do not add or
   change config files every day.  Sure, we can have logging by
   default, but many do not want ~300 lines of extra debugging in their
   logs is not pleasant, and they will complain.  Rebuilding the
   package for that binary package (given the users it is targeted to)
   is usually not within most users grasp.