(ITS#7348) enhancement: check_password contrib module

[Guillaume.Rousse@inria.fr]

Full_Name: Guillaume Rousse
Version: current git HEAD
OS: 
URL: 
Submission from: (NULL) (128.93.30.10)


The attached patch provides an external password checker module for ppolicy.

It was originally created by Michael Steinmann <msl@calivia.com>, then
maintained by Clement Oudot <clem.oudot@gmail.com> as part of the LTP project
(http://ltb-project.org/wiki/documentation/openldap-ppolicy-check-password).
Integrating it directly as an openldap official contrib module would help its
usage, as it relies on private OpenLDAP APIs. See README file for detailed
history and copyrights.