Minor usability enhancement for birdc - show hostname

[Tim Small]

Hi,

I'm finding Bird very useful, thanks!

I wondered if it might be useful to show the hostname in the bird
prompt?  e.g. instead of:

bird>

Something like:

testlab1 bird>

... would spare users the potential frustration or downtime of operating
on the wrong bird instance.

I couldn't see a way of doing this, but would be happy to submit a patch
(to make this configurable or otherwise) if that would be useful?

Thanks!

Tim.