[Standards] Jingle and invisibility

[Lauri Kaila]

Hi list,

XEP-0166 says that the session should be ended when presence of type
"unavailable" is received from the other party. What if the reason was
that the other party became invisibe? Session could stay alive, unless
IQ was also blocked. What if an initiation is received from an
invisible resource?

These situations don't necessarily need any special treatment (it's a
feature, not a bug), but then I think it would be a good idea to add a
note to the spec so that developers would be aware of this.

-lauri