code review.
Fixed the problem that was preventing us from associating a PID file
with the ATS service.
Stopped deleting the "casaatsd" user during RPM un-install to avoid
problems with orphaned files.
Added code to protect against zero length passwords in the Pwd
authentication mechanism.
back-ending a REALM and the ability to configure the search string that
should be utilized when performing a contextless login via the Pwd
Authenticate mechanism.
Also fixed "ReconfigureInterval=0" issue and added the ability
to search using multiple search roots configured on a per-realm
basis in the iaRealms file.
