[issue9425] Rewrite import machinery to work with unicode paths

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

r83971 enables test.support.TESTFN_UNDECODEABLE on non-Windows OSes.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue9425>
_______________________________________