python-pyroute2: new package

[Thomas:
  - fix legal info:
    * the license is GPLv2+ *or* Apache 2.0
    * the license files list separator is space, not comma
    * README.license.md has been added to the license files, since it
      contains some useful information about the licensing.
  - rewrap Config.in help text.]

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>