#!/usr/bin/perl -0p
s|^(session[ \t]+)required([ \t]+)(pam_unix\.so([ \t]+.*)?)\n|$1required$2$3\n$1optional$2pam_krb5.so\n$1optional$2pam_krb524.so\n$1optional$2pam_athena_locker.so\n$1optional$2pam_debathena_home_type.so\n$1optional$2pam_mktemp.so var=ATHENA_SESSION_TMPDIR prefix=/var/run/athena-sessions/session dir\n|m or die;