Honor Pragma: no-cache for HTTP 1.0. The 1.3 proxy rewrite and 2.0 code

already handles both cases (Pragma: and Cache-Control:)
PR: 5668
Submitted by:	Kim Bisgaard <kib@dmi.dk>
Reviewed by:	Chuck Murcko


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@91170 13f79535-47bb-0310-9956-ffa450edef68