If the sum of all ranges in a request is not smaller than the file, fall back

to 200.  This takes care of potential DoS issues from ranges like
0-100,1000-,0-100,1000-,...


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1162331 13f79535-47bb-0310-9956-ffa450edef68