* Set SO_REUSEADDR for listening socket so that there's no need to
wait for it to time out to reopen the same port
* Fixed a crash when changing file priorities and another caused by
torrents with empty directories.
* Added the load, load_run, stop_untied and remove_untied options. See
the example rtorrent.rc for how to use these to watch a directory
for new torrents.
* Fixed a buffer overflow in the peer connection's write buffer that
could in some rare cases cause a crash.
