[Python-ideas] Move tarfile.filemode() into stat module

[Giampaolo Rodolà]

http://hg.python.org/cpython/file/9d9495fabeb9/Lib/tarfile.py#l304
I discovered this undocumented function by accident different years
ago and reused it a couple of times since then.
I think that leaving it hidden inside tarfile module is unfortunate.
What about moving it into stat module and document it?

Regards,

--- Giampaolo
http://code.google.com/p/pyftpdlib/
http://code.google.com/p/psutil/
http://code.google.com/p/pysendfile/