Merge r411306 from trunk:

* Fix a problem with invalid auth error detection for LDAP client SDKs that don't
  support the LDAP_SECURITY_ERROR macro.

PR: 39529
Submitted by: Ray Price <dohrayme yahoo.com>, Josh Fenlason <jfenlason ptc.com>
Reviewed by: bnicholes, wrowe, fielding


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@425731 13f79535-47bb-0310-9956-ffa450edef68