Update url in docs for modern paths and do not silence all curl output

In principle the cron task should only output on error which you
want to know about. Add curl -s to disable curl progressbar but -S
to do show any http errors that occurred.

modules/cron/docs/cron.md

@@ -66,9 +66,9 @@ Now, copy the cron configuration suggested on that page:
 
 ```text
 # Run cron [daily]
-02 0 * * * curl --silent "https://YOUR_SERVER/simplesaml/module.php/cron/cron.php?key=RANDOM_KEY&tag=daily" > /dev/null 2>&1
+02 0 * * * curl -sS "https://YOUR_SERVER/simplesaml/module.php/cron/run/daily/RANDOM_KEY"
 # Run cron [hourly]
-01 * * * * curl --silent "https://YOUR_SERVER/simplesaml/module.php/cron/cron.php?key=RANDOM_KEY&tag=hourly" > /dev/null 2>&1
+01 * * * * curl -sS "https://YOUR_SERVER/simplesaml/module.php/cron/run/hourly/RANDOM_KEY"
 ```
 
 Finally, add it to your crontab by going back to the terminal, and editing with:

modules/cron/templates/croninfo.twig

@@ -14,7 +14,7 @@
         <code id="cronlist">
         <br />
         {%- for url in urls -%}
-        # {{ 'Run cron:'|trans }} [{{ url.tag }}]<br />{{ url.int }} curl --silent "{{ url.exec_href }}" > /dev/null 2>&amp;1<br /><br />
+        # {{ 'Run cron:'|trans }} [{{ url.tag }}]<br />{{ url.int }} curl -sS "{{ url.exec_href }}"<br /><br />
         {%- endfor -%}
         <br />
         </code>