Log Message:
-----------
Stamp 9.0 release notes with expected release date; also some last-minute
copy-editing.
Modified Files:
--------------
pgsql/doc/src/sgml:
release-9.0.sgml (r2.56 -> r2.57)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release-9.0.sgml?r1=2.56&r2=2.57)
pgsql/doc/src/sgml/ref:
alter_table.sgml (r1.115 -> r1.116)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/alter_table.sgml?r1=1.115&r2=1.116)