Pam_keyinit revoke causes issues on systemd systems. Make its use
optional. This brings it in line with Fedora 23 and Centos 7.
(From OE-Core rev:
36825c7b14b92434705a58aa4c22b8c1710a9760)
Signed-off-by: Dan McGregor <dan.mcgregor@usask.ca>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
auth include common-auth
account include common-account
password include common-password
-session required pam_keyinit.so revoke
+session optional pam_keyinit.so revoke
session required pam_limits.so