Message 288053 - Python tracker

$ python2 -S
Python 2.7.12+ (default, Sep 17 2016, 12:08:02) 
[GCC 6.2.0 20160914] on linux2
>>> import x
>>> x.__file__
'x.py'

$ python3 -S
Python 3.6.0 (default, Dec 30 2016, 20:49:54) 
[GCC 6.2.0 20161005] on linux
>>> import x
>>> x.__file__
'/home/inada-n/x.py'

I think we can remove `abs_paths()` in site.py, thanks to _frozen_importlib_external.

I added all import experts to nosy list.
Please give me advice.