No, it doesn't need to be croned. It's run first thing before a tally automatically (action=tally&value=all only). If you run action=bandwidth&value=home, it will parse /var/log/httpd/homedir.log and append the users own bandwidth.tally file with the result. Very simple function.
That just a custom feature requested for installatron. When the plugin.tar.gz is being downloaded, your copy of apache will send headers with the file. If you are denying the request from getting the file (bad IP or something), you'll want to display some text instead of sending an empty tar.gz file. So you'd send your text instead (regular html) but in the httpd headers, you'd add:
X-DirectAdmin: output
When DA saves your tar.gz (which should just be text) it will also see the header there, and will just display the contents of the file onto the screen as whatever message you've included.
It basically just tells DA to show the file instead of trying to extract it/install it.
