[MERGE] Convert launchpad transport into a directory service

[John Arbash Meinel]

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Aaron Bentley wrote:
| Hi all,
|
| This patch uses the new directory service functionality I've just
| submitted in order to provide launchpad's branch lookup as a directory
| service.
|
| This is a much cleaner approach and avoids spurious redirection
| messages.  It does not break the current behavior of "bzr branch lp:bzr".
|
| Aaron

BB:approve

Though I would also like to know if it breaks "bzr pull lp:" or starts to allow
"bzr push lp:".
Or even, does it allow "bzr branch lp: lp:" ?

I think you can use "lp://staging/" to play around with an LP provider that will
have the changes thrown away after a bit of time. (1-day, 1-week, something like
that).

John
=:->
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