Is your feature request related to a problem? Please describe.
After updating /etc/systemd/logind.conf there is no easy way to ask logind to reload the configuration.

Describe the solution you'd like
Is there a reason to not have ExecReload=/bin/kill -HUP $MAINPID in the service file?
This way the configuration can be easily reloaded by just executing systemctl reload systemd-logind.service

Describe alternatives you've considered

• Sending SIGHUP manually to logind PID
• Rebooting