Chat Federation (and a lot more) WIP:

Note: websocket s2s is not working yet, still WIP.

New Features

* Chat Federation:
  * You can now connect to a remote chat with your local account.
  * This remote connection is done using a custom implementation of [XEP-0468: WebSocket S2S](https://xmpp.org/extensions/xep-0468.html), using some specific discovering method (so that it will work without any DNS configuration).

Minor changes and fixes

* Possibility to debug Prosody in development environments.
* Using process.spawn instead of process.exec to launch Prosody (safer, and more optimal).
* Prosody AppImage: fix path mapping: we only map necessary /etc/ subdir, so that the AppImage can access to /etc/resolv.conf, /etc/hosts, ...
* Prosody AppImage: hidden debug mode to disable lua-unbound, that seems broken in some docker dev environments.

server/lib/federation/connection-infos.ts

@@ -36,6 +36,7 @@ function remoteAuthenticatedConnectionEnabled (livechatInfos: LiveChatJSONLDAttr
   if (!livechatInfos.links) { return false }
   if (livechatInfos.type !== 'xmpp') { return false }
   for (const link of livechatInfos.links) {
+    if (link.type === 'xmpp-peertube-livechat-ws-s2s') { return true }
     if (link.type === 'xmpp-s2s') { return true }
   }
   return false