XBitHack

The XBitHack directives controls the parsing of ordinary html documents. This directive only affects files associated with the MIME type text/html. Status can have the following values:

off

No special treatment of executable files.

on

Any file that has the user-execute bit set will be treated as a server-parsed html document.

full

As for on but also test the group-execute bit. If it is set, then set the Last-modified date of the returned file to be the last modified time of the file. If it is not set, then no last-modified date is sent. Setting this bit allows clients and proxies to cache the result of the request.

Note: you would not want to use this, for example, when you #include a CGI that produces different output on each hit (or potentially depends on the hit).