pgsql: Update SGML contrib documentation to catch up with recent changes

Log Message:
-----------
Update SGML contrib documentation to catch up with recent changes to
the former README files. Albert Cervera i Areny

Modified Files:
--------------
pgsql/doc/src/sgml:
cube.sgml (r1.2 -> r1.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/cube.sgml?r1=1.2&r2=1.3)
intarray.sgml (r1.2 -> r1.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/intarray.sgml?r1=1.2&r2=1.3)
pageinspect.sgml (r1.1 -> r1.2)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pageinspect.sgml?r1=1.1&r2=1.2)
pgbench.sgml (r1.2 -> r1.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pgbench.sgml?r1=1.2&r2=1.3)
pgrowlocks.sgml (r1.2 -> r1.3)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pgrowlocks.sgml?r1=1.2&r2=1.3)
pgstandby.sgml (r2.1 -> r2.2)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pgstandby.sgml?r1=2.1&r2=2.2)