pgsql: Remove double-quoting of table names in clusterdb. BACKWARD COM

Remove double-quoting of table names in clusterdb.  BACKWARD COMPABILITY
BREAKAGE.

Remove double-quoting of index/table names in reindexdb.  BACKWARD
COMPABILITY BREAKAGE.

Document thate user/database names are preserved with double-quoting by
command-line tools like vacuumdb.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/d68ccf536e950a07b5a7030bf609936fe65aab51

Modified Files
--------------
doc/src/sgml/ref/createdb.sgml   |    7 +++++--
doc/src/sgml/ref/createlang.sgml |    3 ++-
doc/src/sgml/ref/droplang.sgml   |    1 +
doc/src/sgml/reference.sgml      |    8 ++++++++
src/bin/scripts/clusterdb.c      |    2 +-
src/bin/scripts/createlang.c     |    1 +
src/bin/scripts/droplang.c       |    1 +
src/bin/scripts/reindexdb.c      |    4 ++--
8 files changed, 21 insertions(+), 6 deletions(-)