Update old phpMyAdmin CVE entries

years:
- 2003 (ignored, no CVEs found)
- 2004 (4; 1 has patch links)
- 2005 (9; 3 had patch links)
- 2006 (9; 9 had patch links)
- 2007 (8; 8 had patch links)
- 2008 (10; 10 had patch links)

- 2018 (5; 5 had patch links)
- 2019 (5; 5 had patch links)
- 2020 (1; 1 has patch links)

Fixed links for: http://www.phpmyadmin.net/home_page/security/(.*).php