Give the image the right tag, so that we can push it.

Better follow our own release notes.

* Add 'sandbox' to the CSP for media repo

* Changelog

Fix the variable names used for account_data

* ensure can report mau stats when hs.config.mau_stats_only is set

Allow for the creation of a support user.

A support user can access the server, join rooms, interact with other users, but does not appear in the user directory nor does it contribute to monthly active user limits.

* Improved static/index.html look, feel and content.

* Added accessibility tags to in-line SVG.

* Grammar.

* Improved static/index.html look, feel and content.

* Added accessibility tags to in-line SVG.

* Grammar.

Update link to kernel.org DCO usage

Reduce size of hyperlink

Stop installing Matrix Console by default

Add a welcome page to the static resources

Disable pager for ci script

... otherwise it hangs

This is largely a precursor for the removal of the bundled webclient. The idea
is to present a page at / which reassures people that something is working, and
to give them some links for next steps.

The welcome page lives at `/_matrix/static/`, so is enabled alongside the other
`static` resources (which, in practice, means the client API is enabled). We'll
redirect to it from `/` if we have nothing better to display there.

It would be nice to have a way to disable it (in the same way that you might
disable the nginx welcome page), but I can't really think of a good way to do
that without a load of ickiness.

It's based on the work done by @krombel for #2601.