No more #ifdef XLOG.

src/backend/access/gist/gist.c

src/backend/access/hash/hash.c

src/backend/access/heap/heapam.c

src/backend/access/nbtree/nbtinsert.c

src/backend/access/nbtree/nbtpage.c

src/backend/access/nbtree/nbtree.c

src/backend/access/rtree/rtree.c

src/backend/access/transam/rmgr.c

src/backend/access/transam/transam.c

src/backend/access/transam/transsup.c

src/backend/access/transam/varsup.c

src/backend/access/transam/xact.c

src/backend/access/transam/xlog.c

src/backend/access/transam/xlog_varsup.c

src/backend/access/transam/xlogutils.c

src/backend/commands/dbcommands.c

src/backend/commands/vacuum.c

src/backend/storage/buffer/bufmgr.c

src/backend/storage/buffer/xlog_bufmgr.c

src/backend/storage/buffer/xlog_localbuf.c