Added application/ogg for .ogg files (see

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

This 'fixes' PR 17719.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@100494 13f79535-47bb-0310-9956-ffa450edef68