It redirects stderr to stdout for the script,
so you see any error messages your script causes.
You usually can't see the error messages!
It parses the forms input and passes it to your script
as ordinary arguments. ***(future) and envrionment variables
***
An existing script can easily be modified to become
a forms-responder.
Certain shells (such as csh) can't properly
read the forms data, or don't have enough string processing
capability to deal with it.
COVER also quotes or deletes special characters in
the arguments, to reduce the likelihood of your script
being abused to execute unauthorized commands.
It handles both GET and POST forms
And can also be used via a link (HREF) of a URL with
a query string