browser_side: print a warning when trying to access a non existing contact box: This occurs when you receive updatePresence of a MUC occupant before Libervia knows that this is a MUC. Actually you shouldn't receive presence update for the occupant before the MUC widget is displayed, this means a loss of information. One way to fix it is to modify (un)availableReceived in sat.core.xmpp: check for the entity data "type" or make a disco request if it doesn't exist, and an attribute to presenceUpdate to tell the frontend if we have a MUC occupant or a roster contact.

The file otr.min.js includes:
    - minified versions of the following otr.js dependencies:
      otr/dep/bigint.js otr/dep/crypto.js otr/dep/eventemitter.js
      The following minification tool has been used: yui compressor
    - minified version of otr.js taken from the project homepage

All original files can be retrieved from otr.js repository:
    https://github.com/arlolra/otr/tree/master/build

See the README file of Libervia, or inside otr.min.js itself for licence information.