grab this from 2.1-dev:

mod_isapi: GetServerVariable("ALL_RAW") returned the wrong buffer
size.

PR:             20617
Submitted by:	Jesse Pelton <jsp pkc.com>
Reviewed by:	trawick, stoddard, nd


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@103527 13f79535-47bb-0310-9956-ffa450edef68