Move the check of the Expect request header field after the hook

for ap_post_read_request, since that is the only opportunity for
modules to handle Expect extensions.

Submitted by:	Justin Erenkrantz <jerenkrantz@eBuilt.com>
Reviewed by:	Roy Fielding


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@86937 13f79535-47bb-0310-9956-ffa450edef68