pgsql: Fix omissions in documentation of the pg_roles view.

Fix omissions in documentation of the pg_roles view.

Somehow, column rolconfig got removed from the documentation of the
pg_roles view in the 9.0 cycle, although the column is actually still
there. In 9.1, we'd also forgotten to document the rolreplication column.
Spotted by Sakamoto Masahiko.

Branch
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REL9_0_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/c7e84d53375f0c3405da584b06d758e015d8ce30

Modified Files
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doc/src/sgml/catalogs.sgml | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)