Add a check for MSIE 3 to send multipart/x-byteranges instead of byteranges.

Remove quotes from the boundary string (MSIE has problems with them).

Reviewed by: Paul, Jim, Ben


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@77644 13f79535-47bb-0310-9956-ffa450edef68