[MERGE] add a command for managing the Launchpad user ID.

[John Arbash Meinel]

John Arbash Meinel has voted approve.
Status is now: Semi-approved
Comment:
Would it be reasonable when checking the ssh keys to check that the user 
actually has access to those keys? Right now you seem to just check that 
there does exist an ssh key for that username, but there is a bit more 
to check that the user can actually access LP correctly.

One could (arguably) actually just try to connect to a known/valid 
bzr+ssh/sftp branch. Maybe just trying to connect to 
bzr+ssh://bazaar.launchpad.net/~user/+junk and seeing that you don't get 
NoSuchFile or something like that.

Even so, I fine with merging this.

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3Ca7e835d40710112206h669971b8q252cc10dbe8fe05%40mail.gmail.com%3E