[merge][rfc] test that Transport.append sets permissions on existing files

[Aaron Bentley]

Aaron Bentley has voted approve.
Status is now: Approved
Comment:
It's too bad we can't do a Feature for this instead of just returning. 
(And you know I prefer to raise a TestSkipped.)

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3Ce01316480708142355y111a032fu18637e7aa6a3a701%40mail.gmail.com%3E