python-passlib: new package

comprehensive password hashing framework supporting over 30
schemes.

Signed-off-by: Asaf Kahlon <asafka7@gmail.com>
[Thomas: fix license, it is BSD-3-Clause]
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>