mod_auth_ldap: Handle the inconsistent way in which the MS LDAP library

handles special characters.

MFC: 105379
PR: 24437
Submitted by: Jess Holle
Reviewed by: minfrin, wrowe, jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.0.x@151272 13f79535-47bb-0310-9956-ffa450edef68