Comment 12 for bug 121200

There are patches up for review for:

Bazaar:
- Factor out a needs_launchpad_login method and tell it that bzr+ssh and sftp Launchpad branches require LP logins.
- Improve the text of 'bzr help launchpad'

Launchpad:
- Don't offer SFTP as a branch location.

Still need to do:
- Handle redirects when pushing to new branches.