Fix HDB two-phase commit for LDAP backend

We can't replay log entries when recovering if the backend is shared by
writers with separate logs (or no logs at all), i.e., on other hosts.

lib/hdb/hdb-ldap.c

@@ -2002,7 +2002,7 @@ hdb_ldap_common(krb5_context context,
 
     (*db)->hdb_master_key_set = 0;
     (*db)->hdb_openp = 0;
-    (*db)->hdb_capability_flags = 0;
+    (*db)->hdb_capability_flags = HDB_CAP_F_SHARED_DIRECTORY;
     (*db)->hdb_open = LDAP_open;
     (*db)->hdb_close = LDAP_close;
     (*db)->hdb_fetch_kvno = LDAP_fetch_kvno;