gst/qtdemux/qtdemux.c: Extract all references/redirections if there is more than one and sort them; also extract mini...

Original commit message from CVS:
* gst/qtdemux/qtdemux.c: (qtdemux_redirects_sort_func),
(qtdemux_process_redirects), (qtdemux_parse_tree):
Extract all references/redirections if there is more
than one and sort them; also extract minimum required
bitrate information if available. (#350399)