Back out pg_autovacuum commit after cvs clean failure causes commit.

doc/src/sgml/plperl.sgml

src/backend/Makefile

src/backend/bootstrap/bootstrap.c

src/backend/catalog/Makefile

src/backend/catalog/system_views.sql

src/backend/postmaster/Makefile

src/backend/postmaster/postmaster.c

src/backend/utils/misc/guc.c

src/backend/utils/misc/postgresql.conf.sample

src/include/bootstrap/bootstrap.h

src/include/catalog/catversion.h

src/include/postmaster/postmaster.h

src/include/storage/proc.h

src/include/utils/guc_tables.h

src/test/regress/expected/rules.out