Update sshd_config based on openssh 7.9p1. Drop the deprecated option
UsePrivilegeSeparation
Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
Signed-off-by: Joe MacDonald <joe@deserted.net>

The patch fixes the login fails for ssh -o Batchmode=yes when passwords is
empty and without authorized_keys file even if set "PermitEmptyPasswords yes"
in sshd_config file.
Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com>
Signed-off-by: Wenzong Fan <wenzong.fan@windriver.com>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>

sshd_config file from oe-core to set "UsePAM yes".
sshd file (pam config for sshd) from oe-core to add pam_selinux module.
Signed-off-by: Xin Ouyang <Xin.Ouyang@windriver.com>