Allow relative paths for LDAPTrustedCA to be resolved against ServerRoot PR#26602

reviewed by: bnicholes, minfrin, trawick, jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@103902 13f79535-47bb-0310-9956-ffa450edef68