linux-pam package, invalid option passed to pam_unix.so

In the linux-pam package the file /etc/pam.d/base-password calls pam_unix with the "obscure" option. There is no such option in pam_unix (I have confirmed by checking the source code). Debian's pam_unix does support an "obscure" option but this is because they patch code to add that functionality into the same version of linux-pam.

This reference to an unknown "obscure" option results in log entries such as the following appearing in /var/log/auth.log:

chpasswd[1234]: pam_unix(chpasswd:chauthtok): unrecognized option [obscure]

Simple solution, remove the "obscure" option from the file base-password.pamd in aports/main/linux-pam and rebuild.