[issue3359] add 'rbU' mode to open()

[anatoly techtonik]

anatoly techtonik <techtonik at gmail.com> added the comment:

If you open file with 'r' - all line endings will be mapped precisely to
'\n' anyways, so it has nothing to do with 'U' mode.

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3359>
_______________________________________