Implement federation/v1/send_join

See merge request famedly/conduit!141

Consistent and escaped response in get_pdu

See merge request famedly/conduit!160

1. The fallback text of the get_pdu admin room command response message
   now contains the same text as the formatted_body content (namely, the
   json instead of Debug-formatting of a serde type).
2. The formatted_body content of the get_pdu response is now
   html-escaped.

Statediffs

See merge request famedly/conduit!145

CI: Use full optimizations for master and faster config else

See merge request famedly/conduit!155

Signed-off-by: Jonas Zohren <git-pbkyr@jzohren.de>

Try to set canonical room alias on room creation.

Closes #123

See merge request famedly/conduit!154

The spec does not require servers to apply a room canonical alias event upon room creation (yet).
Still, synapse does that, since users can set their desired alias in Elements room creation dialog.
With this commit, conduit also sets that alias if it is a valid one.

This closes https://gitlab.com/famedly/conduit/-/issues/123

Bump version of alpine docker image to 3.14

See merge request famedly/conduit!150

Set nicer displayname

See merge request famedly/conduit!149

Add support for a minimal `r0/account/3pid`.

See merge request famedly/conduit!151

improvement: try to load missing prev events

See merge request famedly/conduit!152