Unify spelling of "canceled", "canceling", "cancellation"

We had previously (af26857a2775e7ceb0916155e931008c2116632f)
established the U.S. spellings as standard.

Branch
------
REL9_1_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/6b23ba1093d298a41463a24f091c6f86be406449

Modified Files
--------------
doc/src/sgml/high-availability.sgml          |   12 ++++----
doc/src/sgml/indexam.sgml                    |    2 +-
doc/src/sgml/libpq.sgml                      |    2 +-
doc/src/sgml/monitoring.sgml                 |   14 +++++-----
doc/src/sgml/protocol.sgml                   |    2 +-
doc/src/sgml/ref/set_transaction.sgml        |    2 +-
doc/src/sgml/release-7.4.sgml                |    2 +-
doc/src/sgml/release-8.0.sgml                |    2 +-
doc/src/sgml/release-8.1.sgml                |    4 +-
doc/src/sgml/release-8.2.sgml                |    2 +-
doc/src/sgml/release-8.3.sgml                |    2 +-
doc/src/sgml/release-8.4.sgml                |    2 +-
doc/src/sgml/release-9.1.sgml                |    2 +-
src/backend/access/transam/xlog.c            |   12 ++++----
src/backend/commands/vacuum.c                |    4 +-
src/backend/postmaster/autovacuum.c          |    4 +-
src/backend/postmaster/bgwriter.c            |    2 +-
src/backend/storage/buffer/bufmgr.c          |    2 +-
src/backend/storage/lmgr/README-SSI          |    6 ++--
src/backend/storage/lmgr/deadlock.c          |    2 +-
src/backend/storage/lmgr/predicate.c         |   22 ++++++++--------
src/backend/storage/lmgr/proc.c              |    2 +-
src/backend/tcop/postgres.c                  |    2 +-
src/backend/utils/cache/relcache.c           |    2 +-
src/bin/psql/common.c                        |    2 +-
src/bin/scripts/common.c                     |    2 +-
src/port/path.c                              |    2 +-
src/test/regress/expected/prepared_xacts.out |    2 +-
src/test/regress/expected/subselect.out      |   36 +++++++++++++-------------
src/test/regress/sql/subselect.sql           |   10 +++---
30 files changed, 82 insertions(+), 82 deletions(-)

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