Added application/ogg for .ogg files (see

http://www.rfc-editor.org/rfc/rfc3534.txt).

This 'fixes' PR 17720.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@100495 13f79535-47bb-0310-9956-ffa450edef68