Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Add nullok to the pam_unix line.
Major cleanup & homogenization.
Add PAM policy for the "passwd" service, including a sample config linefor pam_passwdqc.Sponsored by: DARPA, NAI Labs