MFbed: Update the German website.

www/de/docs/books.sgml 1.16 -> 1.18
www/de/news/news.xml 1.374 -> 1.379
www/de/news/press.xml 1.186 -> 1.188
www/de/platforms/i386.sgml 1.7 -> 1.8
www/de/platforms/amd64.sgml 1.14 -> 1.15
www/de/platforms/arm.sgml 1.7 -> 1.8

Obtained from: The FreeBSD German Documentation Project.