Bug 630092 - (cov#12068) Resource leak in certmap code

The ldapu_propval_list_free() function was freeing the nodes in
the list, but not the list itself.  We need to free the list itself
after all of the nodes have been freed.

lib/ldaputil/certmap.c

@@ -1472,6 +1472,7 @@ void ldapu_propval_list_free (void *propval_list)
 {
     LDAPUPropValList_t *list = (LDAPUPropValList_t *)propval_list;
     ldapu_list_free(list, ldapu_propval_free);
+    free(list);
 }
 
 int ldapu_certmap_init (const char *config_file,