====== multi_user_info ======
**S → C {type:"multi_user_info", users:[{name:…, name_dn:…, cid:..., talking:…, audio:..., webclient:...}]}**

multi_user_info - list of users connected to a multiuser endpoint (voice gateway, conference call).

The IXNX voice bridge sends such a list when you connect to it, and every time the list contents change (people added/removed from list or start/end talking).

arguments:
  * users - list of users, for each user:
    * name - user's address
    * name_dn - user's display name
    * cid - client ID
    * talking - is user talking:
      * "yes" - user is currently talking
      * "no" - user is currently silent
    * audio - audio fallback:
      * "yes" - user audio is transmitted by voice bridge (voice fallback)
      * "no" - user audio not transmitted by voice bridge (normal operation)
    * webclient - is user a wrtc or SIP client:
      * "yes" - user is a wrtc client capable of multiple media streams
      * "no" - user is a SIP client not capable of multiple media streams, audio always transmitted through voice bridge