pgsql: Update release notes for 7.4.26, 8.0.22, 8.1.18, 8.2.14, 8.3.8, - Mailing list pgsql-committers

Log Message:
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Update release notes for 7.4.26, 8.0.22, 8.1.18, 8.2.14, 8.3.8, 8.4.1.

Modified Files:
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    pgsql/doc/src/sgml:
        release-7.4.sgml (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release-7.4.sgml?r1=1.1&r2=1.2)
        release-8.0.sgml (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release-8.0.sgml?r1=1.1&r2=1.2)
        release-8.1.sgml (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release-8.1.sgml?r1=1.1&r2=1.2)
        release-8.2.sgml (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release-8.2.sgml?r1=1.1&r2=1.2)
        release-8.3.sgml (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release-8.3.sgml?r1=1.1&r2=1.2)
        release-8.4.sgml (r1.12 -> r1.13)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release-8.4.sgml?r1=1.12&r2=1.13)