MFde: Resync de/htdocs/support section

de/htdocs/index.xsl links updated
de/htdocs/support.xml resync
de/htdocs/support/bugreports.xml resync
de/htdocs/support/webresources.xml resync
de/share/xml/navibar.l10n.ent links udpated
de/share/xml/header.l10n.net links updated

Obtained from: The FreeBSD German Documentation Project