$request_length outside of log module

[Richard Kearsley]

Hi
Over time you have been adding functionality to use log variables 
outside of log module, e.g.

Changes with nginx 1.3.8 30 Oct 2012
*) Feature: the $bytes_sent, $connection, and $connection_requests 
variables can now be used not only in the "log_format" directive.

Changes with nginx 1.3.9 27 Nov 2012
*) Feature: the $request_time and $msec variables can now be used not 
only in the "log_format" directive.

Are you going to add the $request_length variable to this list too?

Many thanks