Feature request: Support for %placeholders in procedure URL in alert rules

It would be nice to have support for %placeholder variables in procedure URL. So that you can use the ones mentioned in the doc for alerting; http://docs.librenms.org/Extensions/Alerting/#syntax_1 .
Especially alert rule name/id, hostname, sysname, title, description.

https://github.com/librenms/librenms/issues/4879