audit2allow -

Added (-R/--reference) to audit2allow.  This basically greps through 
reference policy and finds all  matches for a particular
access.  Then outputs them.  It attempts to find the best match.  This 
makes updating reference policy a lot easier.

Changed load_policy to be looked at regardless of the granted flag.

Fixed some -M output so it is easier to cut and paste.

Fixed error handling output.

Handle "msg='avc:" as an AVC message also.  This is output by Userspace 
tools.

Add some checks to semanage and seobject.py to turn off processing on 
non MLS/MCS machines.
(These are untested on a Non MLS/MCS machine, since I do not have access.)