pam security, bug fix, and enhancement update

[1.1.1-13]

• fix environment file handling problems - CVE-2011-3148 (#746619) and
  CVE-2011-3148 (#746620)
  [1.1.1-12]
• add character sequence test to pam_cracklib
• drop unused difignore option from pam_cracklib (#811243)
• add enforce_for_root option to pam_cracklib (#588893)
• mention limits.d in the limits.conf(5) manpage (#723297)
• add ability to lock out inactive accounts to pam_lastlog
• fix require_selinux option in pam_namespace (#750601)
• add mntopts flag for tmpfs polyinstantiation method
• preserve authtok_type in pam_get_authtok() (#811168)
• fix username mismatch in pam_unix remember feature (#815516)
• relax restriction of root in pam_pwhistory
• relax soft nproc limit for root in 90-nproc.conf
  [1.1.1-11]
• additional password checks in pam_cracklib