* remove redirects
* use https links
* replace old attchment links with working ones

Change-Id: Ic9a154f46e142138f0adea7d7b8be3b6cfe8af18
Reviewed-on: https://gerrit.libreoffice.org/52224Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>