pgsql: Fix various common mispellings.

Fix various common mispellings.

Mostly these are just comments but there are a few in documentation
and a handful in code and tests. Hopefully this doesn't cause too much
unnecessary pain for backpatching. I relented from some of the most
common like "thru" for that reason. The rest don't seem numerous
enough to cause problems.

Thanks to Kevin Lyda's tool https://pypi.python.org/pypi/misspellings

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/e1623c3959aac707732d7a6ad09adfb5751763b3

Modified Files
--------------
doc/src/sgml/config.sgml | 2 +-
doc/src/sgml/pgcrypto.sgml | 2 +-
doc/src/sgml/ref/psql-ref.sgml | 2 +-
src/backend/access/transam/generic_xlog.c | 2 +-
src/backend/catalog/namespace.c | 2 +-
src/backend/catalog/sql_features.txt | 2 +-
src/backend/commands/cluster.c | 2 +-
src/backend/main/main.c | 2 +-
src/backend/nodes/README | 2 +-
src/backend/optimizer/util/tlist.c | 2 +-
src/backend/replication/logical/reorderbuffer.c | 2 +-
src/backend/replication/walsender.c | 2 +-
src/backend/storage/buffer/bufmgr.c | 2 +-
src/backend/storage/ipc/procarray.c | 2 +-
src/backend/storage/smgr/md.c | 2 +-
src/backend/tsearch/spell.c | 2 +-
src/backend/utils/adt/formatting.c | 6 +++---
src/backend/utils/adt/geo_spgist.c | 2 +-
src/backend/utils/resowner/resowner.c | 2 +-
src/bin/pg_dump/dumputils.c | 2 +-
src/include/port/win32.h | 2 +-
src/include/storage/freespace.h | 4 ++--
src/test/modules/test_ddl_deparse/README | 2 +-
src/test/regress/expected/event_trigger.out | 8 ++++----
src/test/regress/sql/event_trigger.sql | 6 +++---
src/tools/msvc/Project.pm | 4 ++--
26 files changed, 35 insertions(+), 35 deletions(-)