client_body_in_file_only directive

[jlangevin]

When viewing the
[url=http://wiki.nginx.org/NginxHttpCoreModule#client_body_in_file_only]documentation
for client_body_in_file_only[/url], it shows the only possible values as
[b]on/off[/b].

My confusion occurs when viewing the PHP-FPM
[url=http://php-fpm.org/wiki/Features#Accelerated_upload_support]suggested
usage of client_body_in_file_only[/url], as it shows the directive with
a value of [b]clean[/b].

This makes me wonder if there is possibly an undocumented feature of
Nginx client_body_in_file_only, to clean/remove the resulting file at
some point?

Or is PHP-FPM's documentation just incorrect?

Thanks!

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,139759,139759#msg-139759