mod_ldap calls ldap_simple_bind_s() to validate the user

credentials.  If the bind fails, the connection is left
in an unbound state.  Make sure that the ldap connection
record is updated to show that the connection is no longer
bound.
PR:
Obtained from:
Submitted by:
Reviewed by:	bnicholes, minfrin, jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@103721 13f79535-47bb-0310-9956-ffa450edef68