Pulls in upstream latest changes from [dendrite-fork
](https://github.com/HereNotThere/dendrite)to subtree at
servers/dendrite here.
Co-authored-by: Tak Wai Wong <64229756+tak-hntlabs@users.noreply.github.com>
Co-authored-by: Tak Wai Wong <tak@hntlabs.com>
Co-authored-by: John Terzis <john@hntlabs.com>