fix ITS#3350 (rewrite/remap will be replaced by the rwm overlay)

servers/slapd/back-ldap/back-ldap.h

@@ -205,8 +205,6 @@ ldap_back_map_attrs(
 		char ***mapped_attrs
 );
 
-extern void mapping_free ( void *mapping );
-
 extern int ldap_back_map_config(
 		struct ldapmap	*oc_map,
 		struct ldapmap	*at_map,

servers/slapd/back-ldap/init.c

@@ -216,7 +216,7 @@ ldap_back_conn_free(
 	ch_free( lc );
 }
 
-void
+static void
 mapping_free( void *v_mapping )
 {
 	struct ldapmapping *mapping = v_mapping;

servers/slapd/back-meta/init.c

@@ -145,6 +145,15 @@ conn_free(
 	free( lc );
 }
 
+static void
+mapping_free( void *v_mapping )
+{
+	struct ldapmapping *mapping = v_mapping;
+	ch_free( mapping->src.bv_val );
+	ch_free( mapping->dst.bv_val );
+	ch_free( mapping );
+}
+
 static void
 target_free(
 		struct metatarget *lt