Update the res_ldap.conf file with a better working example.

(closes issue #13861)
Reported by: scramatte
Patches:
      __20080110-res_ldap.conf-2.patch uploaded by blitzrage (license 10)
Tested by: jcovert

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@172894 65c4cc65-6c06-0410-ace0-fbb531ad65f3