The current internal_redirect code always hard sets the new request

to a GET method.  This is not always desireable.  This patch causes
iternal_redirect to preserve the original request method except in
the case of a redirect from the CGI module or for error documents.

Submitted by: asussman@vidya.com (Adam Sussman)
              rasmus@madhaus.utcs.utoronto.ca (Rasmus Lerdorf)
Obtained from: 78b.preserve_redirect_method.patch


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@76341 13f79535-47bb-0310-9956-ffa450edef68