Updated permissions

 * Removed default tech user from SSH access
 * Added ability to add chrooted users
 * Not yet tested

Issue: ascom-au/durasuite-playbook#9

Signed-off-by: Nathan Callister <ncallister@iwsoftware.com.au>
Fixed file permissions for chroot users

Issue: ascom-au/durasuite-playbook#9

Signed-off-by: Nathan Callister <ncallister@iwsoftware.com.au>
Merge branch 'durasuite-playbook#9'

Issue: ascom-au/durasuite-playbook#9

Signed-off-by: Nathan Callister <ncallister@iwsoftware.com.au>