Fix some RFC 2616 14.35.1 compliance issues:

- If there is at least one syntactically invalid byte-range-spec,
  we must ignore the whole header.
- If all ranges are unsatisfiable, send 416.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1163851 13f79535-47bb-0310-9956-ffa450edef68