((users doubleclick a host name and paste result in the installer)

Always attempt to discover the configured STUN/TURN servers.

* feat: Drops multiplexing support by default.

* fix: Fix purge of jitsi-meet-prosody.

Clean the accounts when there is a - in the domain name.
Removes the certificate so reinstall will not cause problems.

* feat: Enables bridge websockets by default.

* fix: External-ip conflicts with denied-peer-ip.

In cases where the bridge and coturn are on the same machine and the local address is any of the networks from denied-peer-ip, coturn is not using its public address to probe it and communication fails as the other address is deneid.

* squash: Fix a comment.

* fix: Updates coturn config on update.

* fix: Updates console message.

* Move STUN/TURN to IANA-assigned ports - 3478 and 5349 (TLS)

* Change remaining references to TURNS port from 4445 to 5349

* Change back TURNS to 443

* 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>

* debian: Does not add a link of turnserver will not be configured. Fixes #5596.

* debian: Partially reverts 990c77bd.

* debian: Skip filename duplication, use variable.

* Adds package that can configure using turnserver for jitsi-meet.

Activates http2 on the nginx host and uses the alpn send with the web requests to multiplex traffic to be served as web of proxied to the turn server.
It needs nginx at least v1.13.10.
Adds turncredentials module from Philipp Hancke, with small modification (all int values for hosts need to be strings/tostring()) in order to be able to use the module with prosody 0.11.

* Moves loading of stream after loading stream module (50-..).

* Leaves DISABLE_TCP_HARVESTER to be handled by jvb.

* Fixes comments.

* Properly detect first time coturn install and configure it.

* Handles upgrading from jetty serving web.

* Does not create jvb user if already exists.

* Fixes let's encrypt and adds turnserver handling.

* Enables use of turn server in config.js if available.

* Adds a check whether prosody config exists.

There are cases where deployments can still have configured prosody in the main prosody config in /etc/prosody.