pam_passwdqc: new recipe

pam_passwdqc is a simple password strength checking module for
PAM-aware password changing programs, such as passwd(1).

It is capable of checking password or passphrase strength,enforcing
a policy, and offering randomly-generated passphrases,with all of
these features being optional and easily (re-)configurable.

Signed-off-by: Li Xin <lixin.fnst@cn.fujitsu.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>