Remove old logging implementation for idmapd and rework gssd and idmapd to use the...

This patch removes all of the old idmap_* logging functions and replaced them
with the corresponding xlog functions. In addition that that it also reworks
the gssd logging wrappers to use the new xlog_backend. Finally it makes
necessary changes to the build files to get the project compiling again.

Signed-off-by: David P. Quigley <dpquigl@tycho.nsa.gov>
Signed-off-by: Kevin Coffman <kwc@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>