[Libguestfs] [PATCH libnbd 0/2] Two simple patches

These patches aren't related to each other, but both are quite simple. The second one requires particular attention - it's my experience that printing out the state transitions in debug mode has never helped me to diagnose a bug, but it has made the debug logs huge and hard to follow. However that might just be me! Has it helped anyone else? Also I'm open to the concept of debug levels (LIBNBD_DEBUG=2 etc) Rich.