[Xastir] improved error messages for interface failures?

[Jason Winningham]

Something else that I forgot to mention:  would it be appropriate to  
add retry capability to local devices?  IIRC, an internet server  
interface can be flagged to reconnect on net failure, but there's no  
such option for other devices.

Here's the scenario that happened Saturday:  GPS and two TNCs plugged  
in to USB/rs232 adapters, which in turn are plugged into a USB hub.   
The hub flaked out, dropping all three devices.  I had to a) realize  
there was a problem, and b) restart the interfaces.  This happened  
multiple times (boo Belkin).

To complicate matters, the lockfiles were left in place and I wasn't  
able to do a simple restart of xastir to clear things up.  There  
_might_ have been a message to STDERR about the lockfiles, but I  
don't know for sure as I was driving and my navigator isn't as  
familiar with xastir as I am.

-Jason
kg4wsv