pgsql: Use '=' when documenting long options.

Use '=' when documenting long options.

Branch
------
master

Details
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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(-)