[MERGE] sftp transport: do not chmod a dir when unecessary (fix suid and sgid problems).

[Ian Clatworthy]

Ian Clatworthy has voted approve.
Status is now: Approved
Comment:
I'll merge.

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C20080709.115028.572522674361770034.Christophe.Troestler%40umh.ac.be%3E