On an internal redirect (particularly for an ErrorDocument handler),

store the original method in the subprocess environment so that it
will be noted as REDIRECT_REQUEST_METHOD for any subprocess script.
This is to avoid serving a full response on a HEAD request that has
been redirected to a special handler.  [Roy thinks that this would be
better just redirecting as a HEAD request, but this fix is probably needed
for other methods anyway.]

Submitted by: Rob Hartill
Reviewed by: Brian Behlendorf, Chuck Murcko, Roy Fielding


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@77114 13f79535-47bb-0310-9956-ffa450edef68