This is meant to replace the relay eventually, but for now it's a new
option, like BT or SMS, to be chosen. Protocol is handled in common/
code for the first time, meaning that linux and android interact without
the need to keep two platforms in sync. Linux uses lib-mosquitto, and
Android uses eclipse's Paho client (the generic java version, not the
one that uses four-year-old Service patterns and so crashes for SDK >=
26.)
the case where one of several guests wants to rematch is a hard
problem for later.) Requires passing old-style relayIDs (connname plus
device index) when devIDs aren't available, which they may not always
be.
for Rematch): works for linux version, provided you know the relayID
of the device you're inviting. Added to common/ a stream-saving
version of java's NetLaunchInfo I'll probably want to use there too
for cross-platform compatibility (there being no jni support for
json.)
