[MERGE][#251008] lowercase the provided username in launchpad-login

[John Arbash Meinel]

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Michael Hudson wrote:
> All Launchpad ids are lowercase, and nothing useful happens if you try
> to set your launchpad-login to a string containing upper case characters:
> 
> mwh at grond:lowercase-lp-id$ bzr launchpad-login MwHudson
> bzr: ERROR: https://launchpad.net/%7EMwHudson/%2Bsshkeys is permanently
> redirected to https://launchpad.net/~mwhudson/+sshkeys
> 
> 
> So this very simple patch simply lowercases any provided name.  No
> tests, as there are no blackbox tests for launchpad-login (indeed, it's
> hard to see how you could).
> 
> Cheers,
> mwh
> 

BB:approve

John
=:->

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