Transport connection caches must go.

[Aaron Bentley]

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Robert Collins wrote:
| On Mon, 2006-05-22 at 19:43 -0500, John Arbash Meinel wrote:
|>One could argue for a single BzrDir connection. But I think it would be
|>nice if doing "bzr branch sftp://foo/one sftp://foo/two" didn't require
|>you to login twice. And remembering the connection at the Transport
|>level seems the right place to do it.

| In the specific case case you mention, its possible that a cache is the
| best way, but I'll think about this in more detail next week.

It might be a good idea to consider lightweight checkouts in that
thinking, since WorkingTree.open_containing('foo') may mean opening a
branch on a server that we already are connected to.

Aaron
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