whether or not it exists, and is a regular file with size greater
than zero.</li>
- <li>'<strong>-U</strong>' (is existing URL, via
+ <li><p>'<strong>-U</strong>' (is existing URL, via
subrequest)<br />
Checks whether or not <em>TestString</em> is a valid URL,
accessible via all the server's currently-configured
access controls for that path. This uses an internal
subrequest to do the check, so use it with care -
- it can impact your server's performance!</li>
+ it can impact your server's performance!</p>
+ <p> This flag <em>only</em> returns information about things
+ like access control, authentication, and authorization. This flag
+ <em>does not</em> return information about the status code the
+ configured handler (static file, CGI, proxy, etc.) would have
+ returned.</p> </li>
<li>'<strong>-x</strong>' (has e<strong>x</strong>ecutable
permissions)<br />