[MERGE] "bzr commit" fails with Microsoft FTP Service

[Andrew Bennetts]

Andrew Bennetts has voted resubmit.
Status is now: Resubmit
Comment:
I think it should be more like "s.startswith('550')".  The patch in its 
current form has a much too large chance of catching other errors.

http://cr.yp.to/ftp/stor.html does say that a 550 response is expected, 
so this seems to be a correct thing to do.

(Actually, given that responses in FTP can be multiline, including being 
preceded by "marks" with 1xx codes, maybe this should be 
"s.splitlines()[-1].startswith('550')"?)

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3Cad8e2a1b0804080606q1d22297cpcd938db5bceeb38e%40mail.gmail.com%3E