Validate the file path of the trusted certificate file at the time the...

Validate the file path of the trusted certificate file at the time the LDAPTrushedCA directive is handled. PR#30782

Reviewed by: bnicholes, trawick, clar


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@104842 13f79535-47bb-0310-9956-ffa450edef68