Return a 301 instead of a 302 from a redirect when a directory is

missing a trailing '/' to allow it to be cacheable.

Closes PR#77.

Reviewed by: Marc Slemko, Ed Korthof, Dean Gaudet
Submitted by: Markus Gyger <mgyger@itr.ch>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@77577 13f79535-47bb-0310-9956-ffa450edef68