MFde: Update the German website.

www/de/developers.sgml 1.232 -> 1.233
www/de/docs/books.sgml 1.39 -> 1.40
www/de/security/security.sgml 1.207 -> 1.208
www/de/share/sgml/news.xml 1.275 -> 1.278
www/de/share/sgml/press.xml 1.88 -> 1.90

Obtained from: The FreeBSD German Documentation Project