Peertube users avatars optimization (Fix#303):
* avoid multiple parallel request to load same avatar from Peertube
* send "item-not-found" stanza when no avatar, instead of a vCard without avatar
* build-conversejs.sh: adding the ability to use a specific commit (to
include some patches that are not upstream for now)
* Using patched ConverseJS for performance improvment (related to #96):
* debounce MUC sidebar rendering in ConverseJS (Fix#138)
* force history pruning, even if messages keep coming (Fix#140)
Hide nickname changes when previous nickname was like "Anonymous 12345".
Helps to improve performances when massive anonymous users are joining (#138), and prevent displaying unnecessary messages (#111).
* Remember the chosen nickname in sessionStorage, to avoid entering it again too often.
* Fix: if an anonymous chat user enter spaces in the nickname choice, it will allows them to keep the random nickname.
* New settings: "Ban anonymous user's IP when user is banned from a chatroom":
* if enabled, every time a streamer bans an anonymous user, it will ban its IP on the chat server,
* banned IPs are logged on disk, so server's admin can use them to feed fail2ban (for example),
* option disabled by default, because could be used to create trapped-rooms on public servers
* Start and stop the bot WIP
* Prosody: removing the BOSH module from the global scope (must only be present on relevant virtualhosts)
* Some refactoring
Links to documentation are now using the front-end language to point to the translated documentation page
(except for some links generated from the backend, in the diagnostic tool for example).
Partial fix for #224.
Bypassing Nginx for API call originated from Prosody (if Peertube >=5.1).
Can also fix some Docker setup, which needed to set the prosody-peertube-uri settings.
