Add files from parent branch HEAD:

	src/backend/access/transam/varsup.c
	src/backend/access/transam/xlog.c
	src/backend/catalog/pg_proc.c
	src/backend/commands/cluster.c
	src/backend/storage/freespace/freespace.c
	src/backend/storage/lmgr/deadlock.c
	src/backend/utils/adt/varlena.c
	src/backend/utils/mb/conv.c
	src/backend/utils/mb/wchar.c
	src/port/copydir.c