The Microsoft LDAP SDK escapes filters for us, stop util_ldap

from escaping filters twice when the backslash character is used.
PR:	24437
Obtained from:
Submitted by:	Jess Holle <jessh@ptc.com>
Reviewed by:	minfrin, jim, trawick, bnicholes


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@103730 13f79535-47bb-0310-9956-ffa450edef68