#29: darcs get to an invalid ssh repo url hangs

darcs repository web UI and hosting app. This is the main darcsden trunk, which also runs hub.darcs.net. (https://hub.darcs.net)

#29darcs get to an invalid ssh repo url hangs

Reported by stepkut.

 this works fine: darcs get hub.darcs.net:myrepo
 this seems to hang: darcs get hub.darcs.net:/me/myrepo

--debug-verbose shows more detail.

Simon Michael Sun Oct 7 23:40:16 UTC 2012
- description updated
Simon Michael Mon Oct 8 02:49:15 UTC 2012
- removed tag easy
An easier way to reproduce:
```
scp hub.darcs.net:nosuchrepo .
```
I think an exception is raised here and ssh's Channel monad just carries on (should close the connection.)
Simon Michael Mon Oct 8 03:13:22 UTC 2012
- status set to closed
Fixed this case.