Pulling multiple branches in the same repository

[Aaron Bentley]

Martin Pool wrote:

> We do wait for some time for the lock; we just don't communicate it  
> very well.  What I mean is
> 
>   "waiting 30s for lock held by foo at host...."
> 
> and then C-c should interrupt it properly.

I get the distinct impression that we don't wait on pull.  Instead, it 
seems as though we lock the branch, try and fail to lock the repository, 
and throw, leaving the branch locked.

Aaron