Back out last commit --- wrong patch.

src/backend/access/transam/clog.c

src/backend/bootstrap/bootstrap.c

src/backend/postmaster/postmaster.c

src/backend/storage/ipc/ipci.c

src/backend/tcop/postgres.c

src/backend/utils/misc/guc.c

src/include/miscadmin.h

src/include/storage/ipc.h

src/include/utils/guc.h