Ensure LDAP version is set to v3 on every bind.

PR: 14235
Obtained from:
Submitted by:	Sergey A. Lipnevich <sergeyli@pisem.net>
Reviewed by:	Graham Leggett


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@98420 13f79535-47bb-0310-9956-ffa450edef68