Minor usability enhancement for birdc - show hostname

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.