Use useradd and update-rc.d classes in the OpenSSH recipe
The current sshd postinst and postrm scripts in the OpenSSH make the
package dependant of the adduser/addgroup scripts which may not be
available on all systems.
This patch replaces the sshd postinst and postrm scripts with proper
usage of the useradd and update-rc.d classes.
This patch had been modified from the previous proposed version to
use useradd long options for more clarity.
Signed-off-by: Julian Pidancet <julian.pidancet@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>