Собственно, сабж.
Greetings! After three months in /testing, the PAM merge into the main tree is now complete. When updating, be sure to install the new pam, cracklib, and libpwquality packages or you may find yourself locked out of your machine. Otherwise, these changes should be completely transparent and you shouldn't notice any obvious operational differences. Be careful if you make any changes in /etc/pam.d/ - leaving an extra console logged in while testing PAM config changes is a recommended standard procedure. Thanks again to Robby Workman, Vincent Batts, Phantom X, and ivandi for help implementing this. It's not done yet and there will be more fine-tuning of the config files, but now we can move on to build some other updates. Enjoy!
https://mirror.yandex.ru/slackware/slackware64-current/ChangeLog.txt