cron.xml syntax

[elharo]

In cron.xml (and cron.yaml) we could put code inspections/problem markers on the syntax of a schedule element. This is not well documented.

<?xml version="1.0" encoding="UTF-8"?>
<cronentries>
  <cron>
    <url>/hello</url>
    <description>Hot for no reason</description>
    <schedule>every 1 minutes</schedule>
  </cron>
</cronentries>