pgsql: Fix more typos in comments.

Fix more typos in comments.

Patch by CharSyam, plus a few more I spotted with grep.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/fa60fb63e511e7bbcf57ce972338711593a5e7c9

Modified Files
--------------
src/backend/access/brin/brin_pageops.c          |    2 +-
src/backend/access/heap/README.tuplock          |    2 +-
src/backend/access/transam/twophase.c           |    2 +-
src/backend/access/transam/xact.c               |    2 +-
src/backend/commands/event_trigger.c            |    2 +-
src/backend/commands/vacuumlazy.c               |    2 +-
src/backend/postmaster/bgwriter.c               |    2 +-
src/backend/replication/basebackup.c            |    4 ++--
src/backend/replication/logical/origin.c        |    2 +-
src/backend/replication/logical/reorderbuffer.c |    4 ++--
src/backend/replication/logical/snapbuild.c     |    8 ++++----
src/backend/replication/slot.c                  |    2 +-
src/backend/storage/buffer/bufmgr.c             |    2 +-
src/backend/storage/ipc/dsm.c                   |    2 +-
src/backend/storage/ipc/procarray.c             |    2 +-
src/backend/storage/ipc/shm_mq.c                |    2 +-
src/bin/pg_dump/pg_dump.c                       |    2 +-
src/bin/pg_upgrade/pg_upgrade.c                 |    2 +-
src/bin/psql/print.c                            |    2 +-
src/include/c.h                                 |    2 +-
src/include/utils/rel.h                         |    2 +-
src/interfaces/libpq/fe-auth.c                  |    4 ++--
src/tools/pgindent/pgindent                     |    2 +-
23 files changed, 29 insertions(+), 29 deletions(-)