[JDEV] Heartbeat patch for dialup and laptop users and faulty presence info

[Nathan Sharp]

Actually, the solution I'm thinking of would not have this problem.  All 
you care about is that the connection is up.  The ping/pong stuff is 
just there to prove the connection when other data isn't happening.  So 
if you've received packets from the other side, you forego the ping/pong 
stuff (saving bandwidth and preventing the disconnect problem w/ slow 
links).  

Thanks for the point, though, as this is an important caveat to think 
about for this feature.

David Waite wrote:

> Right; with an application level ping/pong you disconnect under load 
> even if the other side is actively accepting data.
>
> -David Waite
>