Comment 10 for bug 129307

To make the handling of redirections separate for each format, I moved it from
BzrDir.open_from_transport to BzrDir.BzrDirFormat.find_transport_and_format (a new method not to perturb the find_format which is redefined in terms of the former). I also needed to modify workingtree.WorkingTreeFormat.find_format to include redirection handling. Possibly redirection handling should be more pervasive in "find_format" methods but I'll let you judge. With the attached path,

bzr.skynet branch http://users.skynet.be/Pierre.Brukier/anum/projet

(this bug) as well as

bzr merge ttp://users.skynet.be/Pierre.Brukier/anum/projet

(bug #226303) work properly.