Added double-buffering to mod_include to improve performance on

server-side includes.

Submitted by: Marc Slemko
Reviewed by: Roy Fielding, Brian Behlendorf, Dean Gaudet


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@77621 13f79535-47bb-0310-9956-ffa450edef68