[docs] [issue19060] docs: note that subprocess doesn't replace os.exec*

[Roundup Robot]

Roundup Robot added the comment:

New changeset d2ad2e04dc9d by Benjamin Peterson in branch '3.4':
merge 3.3 (#19060)
http://hg.python.org/cpython/rev/d2ad2e04dc9d

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19060>
_______________________________________