The docs already mention that ErrorDocument 401 must refer

to a local document, but it doesn't look good if Apache
replies with a redirect instead of a 401 error in such
a case. This is now checked in set_error_document().


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82392 13f79535-47bb-0310-9956-ffa450edef68