Systems with systemd have /sbin/init as a symlink pointing to real init.
Sshd template tries to bind-mount special init implementation.
The problem is that one cannot bind-mount to a location that is a symlink.

Fix this by deferencing /sbin/init symling and using that as bind-mount location.
Signed-off-by: Nikolay Martynov <mar.kolya@gmail.com>