MFbed: Update the German website.

www/de/includes.sgml fixes only
www/de/includes.xsl fixes only
www/de/index.xsl 1.146 -> 1.150
www/de/news/news.xml 1.396 -> 1.398
www/de/news/press.xml 1.189 -> 1.193
www/de/platforms/ia64/index.xsl 1.3 -> 1.5
www/de/platforms/ia64/todo.xsl 1.4 -> 1.6
www/de/security/security.sgml 1.182 -> 1.184

Obtained from: The FreeBSD German Documentation Project.