pgsql: Use '=' when documenting long options.

Use '=' when documenting long options.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/ed0327495c4241fad55a61c0e5d54366c3ea076c

Modified Files
--------------
doc/src/sgml/pgupgrade.sgml      |   18 +++++++++---------
doc/src/sgml/ref/clusterdb.sgml  |   10 +++++-----
doc/src/sgml/ref/createdb.sgml   |   20 ++++++++++----------
doc/src/sgml/ref/createlang.sgml |    8 ++++----
doc/src/sgml/ref/createuser.sgml |    8 ++++----
doc/src/sgml/ref/dropdb.sgml     |    6 +++---
doc/src/sgml/ref/droplang.sgml   |    8 ++++----
doc/src/sgml/ref/dropuser.sgml   |    6 +++---
doc/src/sgml/ref/psql-ref.sgml   |   28 ++++++++++++++--------------
doc/src/sgml/ref/reindexdb.sgml  |   12 ++++++------
doc/src/sgml/ref/vacuumdb.sgml   |   10 +++++-----
11 files changed, 67 insertions(+), 67 deletions(-)