Some links are http when behind an https->http reverse proxy

My setup is jetty/xwiki behind apache using mod_proxy because jetty does not support AJP.

In xwiki.cfg:

xwiki.url.protocol=https

and this is verified to be working by:

$doc.getExternalUrl()

displaying the https url.

However some URLs (for example the button which installs extensions) are still sent as http which makes non AJP forward proxy installations unfeasible.