The user guide doesn't say how to configure an http proxy but it should.
There is something now in the user guide I'm sure
http://doc.bazaar.canonical.com/latest/en/user-reference/index.html?highlight=proxy
This is now documented in http://doc.bazaar.canonical.com/latest/en/user-guide/configuring_bazaar.html#using-a-network-proxy as well as in the "Authentication Settings" chapter.
Bug watches keep track of this bug in other bug trackers.
There is something now in the user guide I'm sure
http:// doc.bazaar. canonical. com/latest/ en/user- reference/ index.html? highlight= proxy