[issue8513] subprocess: support bytes program name (POSIX)

[STINNER Victor]

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

Hum, os.get_exec_path() has no test for the new features (support b'PATH' key and bytes value).

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8513>
_______________________________________