MFde: Update the German website.

www/de/share/sgml/header.l10n.ent 1.8 -> 1.10
www/de/share/sgml/libcommon.xsl 1.24 -> 1.25
www/de/share/sgml/news.xml 1.218 -> 1.220
www/de/share/sgml/press.xml 1.71 -> 1.73

Obtained from: The FreeBSD German Documentation Project