pgsql: Add some links to tables

Log Message:
-----------
Add some links to tables

Modified Files:
--------------
    pgsql/doc/src/sgml:
        isn.sgml (r1.6 -> r1.7)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/isn.sgml?r1=1.6&r2=1.7)
        pgcrypto.sgml (r1.10 -> r1.11)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pgcrypto.sgml?r1=1.10&r2=1.11)
        pgstattuple.sgml (r1.6 -> r1.7)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/pgstattuple.sgml?r1=1.6&r2=1.7)
        seg.sgml (r1.7 -> r1.8)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/seg.sgml?r1=1.7&r2=1.8)
        tablefunc.sgml (r1.5 -> r1.6)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/tablefunc.sgml?r1=1.5&r2=1.6)
        uuid-ossp.sgml (r1.3 -> r1.4)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/uuid-ossp.sgml?r1=1.3&r2=1.4)
        xml2.sgml (r1.9 -> r1.10)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/xml2.sgml?r1=1.9&r2=1.10)