Merge r225746 from trunk:

* modules/ldap/util_ldap_cache_mgr.c (util_ald_cache_insert): Fix a
cache corruption case: ensure that there is room in the cache for a
copy of the payload before inserting the node.

PR: 34209
Reviewed by: jorton, bnicholes, minfrin


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.0.x@227332 13f79535-47bb-0310-9956-ffa450edef68