Add missing cross-links in system catalog documentation

When Who What
2020-09-03 11:38:43 Peter Eisentraut (petere) Closed in commitfest 2020-09 with status: Committed
2020-09-03 11:38:43 Peter Eisentraut (petere) Changed committer to petere
2020-08-28 06:29:09 Peter Eisentraut (petere) Added petere as reviewer
2020-08-02 21:55:27 Daniel Gustafsson (d_gustafsson) Closed in commitfest 2020-07 with status: Moved to next CF
2020-06-15 18:52:02 Dagfinn Ilmari Mannsåker (ilmari) Changed authors to Dagfinn Ilmari Mannsåker (ilmari)
2020-06-15 18:51:46 Dagfinn Ilmari Mannsåker (ilmari) Attached mail thread 87mu5xqc11.fsf@wibble.ilmari.org
2020-06-15 18:51:46 Dagfinn Ilmari Mannsåker (ilmari) Created patch record