jailkit_chroot_authorized_keys_template in shelluser_base_plugin.inc.php
There are two shelluser_*_plugin.inc.php
files, shelluser_jailkit_plugin.inc.php
was updated to use the jailkit_chroot_authorized_keys_template
server config setting, but shelluser_base_plugin.inc.php
still has /root/.ssh/authorized_keys
hardcoded. I have not explored the conditions under which the latter is effective (I'd guess creating a shell user which is not using jailkit?).