Обсуждение: pgsql: Update 9.1 release notes to reflect commits through today.

Update 9.1 release notes to reflect commits through today.

Also do some desultory copy-editing on the notes.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/e9c9a920680595b7726148852e19deeb1f7b98a5

Modified Files
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doc/src/sgml/extend.sgml      |    2 +-
doc/src/sgml/release-9.1.sgml |  374 ++++++++++++++++++++++++++++++----------
2 files changed, 281 insertions(+), 95 deletions(-)