* debian: Update coturn udp port to non-privileged one.

* debian: Turnserver config requires jitsi-meet-web-config files.

* doc: Updates doc, removing `--no-install-recommends`.

* debian: Moves checks and configs to default to prosody 0.11.

* debian: Disable room locking on internal muc.

* add scripts for deploying coturn with certbot

* turnserver: Removes unused variable showing error.

* debian: updates let's encrypt and coturn scripts.

* debian: Detect failure to retrieve external ip address.

* debian: Always configure turn when the turnserver package is installed.

Co-authored-by: Julien Fastré <julien.fastre@champs-libres.coop>

The 'previd' query parameter will be use to match user id of the session
being resumed when the smacks module and token authentication are
enabled in Prosody. Otherwise user gets new random id every time and
this doesn't work with the smacks module.

* hook on websocket events

* initial session for bosh and websockets

use optional prefix in poltergeist room lookup

This was broken with commit c1fb1a7def, which splits the result in order to print the error reason and in case of error was not returning the error and the message to prosody internals.

Adds some debug messages when token verification fails for some reason.

This is a hook to override the username that will be used when authenticating token users (which are using anonymous login with auto-generated username).

Remove unnecessary cjson config

See: http://s2sauth.bitbucket.org/