pgsql: Mark all GUC variables with <varname> markup, rather than <liter

Mark all GUC variables with <varname> markup, rather than <literal>.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=03c25dd900d97c0868ad20b925a78d41ec603578

Modified Files
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doc/src/sgml/datetime.sgml | 6 ++--
doc/src/sgml/libpq.sgml | 46 ++++++++++++++++++------------------
doc/src/sgml/maintenance.sgml | 14 +++++-----
doc/src/sgml/pgarchivecleanup.sgml | 2 +-
doc/src/sgml/pgstandby.sgml | 12 ++++----
doc/src/sgml/protocol.sgml | 38 +++++++++++++++---------------
doc/src/sgml/ref/pg_dump.sgml | 2 +-
7 files changed, 60 insertions(+), 60 deletions(-)