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


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@103708 13f79535-47bb-0310-9956-ffa450edef68