ITS#8799 Let the common backend be configured through cn=config

servers/slapd/back-ldap/chain.c

@@ -1332,7 +1332,7 @@ chain_ldadd( CfEntryInfo *p, Entry *e, ConfigArgs *ca )
 
 	} else
 #endif
-	if ( lc->lc_common_li != NULL && at == NULL ) {
+	if ( lc->lc_common_li != NULL && lc->lc_common_li != lc->lc_cfg_li && at == NULL ) {
 		/* FIXME: we should generate an empty default entry
 		 * if none is supplied */
 		Debug( LDAP_DEBUG_ANY, "slapd-chain: "
@@ -1352,6 +1352,7 @@ chain_ldadd( CfEntryInfo *p, Entry *e, ConfigArgs *ca )
 
 	}
 	rc = ldap_chain_db_init_one( ca->be );
+	lc->lc_cfg_li = NULL;
 
 	if ( rc != 0 ) {
 fail:
@@ -1457,6 +1458,8 @@ chain_cfadd( Operation *op, SlapReply *rs, Entry *p, ConfigArgs *ca )
 		ca->be->be_private = priv;
 	}
 
+	lc->lc_cfg_li = NULL;
+
 	return 0;
 }