openssh: make pam_systemd optional.

srcpkgs/openssh/template

@@ -3,7 +3,7 @@ _desc="The OpenSSH implementation of SSH protocol"
 
 pkgname=openssh
 version=6.6p1
-revision=3
+revision=4
 build_style=gnu-configure
 configure_args="--without-tcp-wrappers --datadir=/usr/share/openssh
  --sysconfdir=/etc/ssh --without-selinux --with-privsep-user=nobody
@@ -37,8 +37,7 @@ post_install() {
 	# Disable pam_cracklib
 	sed '/pam_cracklib.*/d' -i ${DESTDIR}/etc/pam.d/sshd
 	# Enable pam_systemd.so by default.
-	printf "session\trequired\tpam_systemd.so\n" >> \
-		${DESTDIR}/etc/pam.d/sshd
+	printf "-session\trequired\tpam_systemd.so\n" >> ${DESTDIR}/etc/pam.d/sshd
 }
 
 openssh-server_package() {