pgsql: Update messages, comments and documentation for materialized vie

Update messages, comments and documentation for materialized views.

All instances of the verbiage lagging the code. Back-patch to 9.3,
where materialized views were introduced.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/02d2b694ee42a9e241d37ce67df122fff43d5bb9

Modified Files
--------------
doc/src/sgml/maintenance.sgml | 2 +-
src/backend/access/heap/tuptoaster.c | 4 ++--
src/backend/catalog/aclchk.c | 1 -
src/backend/catalog/heap.c | 5 ++---
src/backend/commands/comment.c | 2 +-
src/backend/commands/indexcmds.c | 6 +++---
src/backend/commands/seclabel.c | 2 +-
src/backend/commands/tablecmds.c | 2 +-
src/backend/commands/typecmds.c | 9 ++++++++-
src/backend/commands/vacuum.c | 6 +++---
src/backend/parser/parse_utilcmd.c | 2 +-
src/backend/rewrite/rewriteDefine.c | 2 ++
src/bin/pg_dump/common.c | 4 ++--
src/pl/tcl/pltcl.c | 2 +-
src/test/regress/expected/create_table_like.out | 2 +-
15 files changed, 29 insertions(+), 22 deletions(-)