Обсуждение: pgsql: Add compatibility note warning that plpgsql is now stricter about

Log Message:
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Add compatibility note warning that plpgsql is now stricter about the column
datatypes of composite results, per gripe from Marcel Asio.  Some desultory
copy-editing of plpgsql-related sections of the release notes.

Modified Files:
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    pgsql/doc/src/sgml:
        release-9.0.sgml (r2.35 -> r2.36)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release-9.0.sgml?r1=2.35&r2=2.36)