Add a <default> for Multiviews Match and reference that directive

in upgrading.

Note that there are LOTS of things missing from upgrading.xml.  As you
stumble on differences between 1.3 and 2.0, please add them to that file.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97583 13f79535-47bb-0310-9956-ffa450edef68