Log Message:
Update "libtorrent" package to version 0.12.4 and "rtorrent" \ 
package
to version 0.8.4. Changes since 0.12.2 respectively 0.8.2:
- Fixed EINTR handling in execute command.
- Fixed a couple of memory leaks in xmlrpc.cc.
- Initial seeding support added.
- Added a work-around for the stdin kqueue bug in MacOSX.
- Numerous bug-fixes and patches.
- Work-around for OpenBSD's broken sys/event.h, which fails to compile
  if it's the first (or only) included header. (Ticket #1470)
- Fixes compilation with old libcurl versions. (Ticket #1471)
- Fix compile error on systems that lack mincore(2).
- Fixes a crash in epoll due to libcurl/c-ares bug:
  PollEPoll::modify(...) epoll_ctl call failed.
- Enforce an http transfer timeout when libcurl fails to honor
  it. Also set a 5-minute timeout for (previously unlimited) torrent
  transfers and fixes the argument type for curl_easy_setopt values.
- Allows bandwidth throttles to work without floating point support.
- Added the 'd.add_peer=host[:port]' command to manually add a peer
  (not for torrents marked "private"), port 6881 is the default.
- Allows banning the selected peer with "B". No unbanning is possible
  yet.
- Added system.method.{insert,erase} commands that allows
  user-specified commands. E.g "system.method.insert=foo,print=Bar".
- Differentiate between commands that have no target, and those that
  take generic targets, when using XMLRPC.
- Added 'event.download.inserted_{new,session}' that are triggered
  when a new or a session torrent is added. Ticket #1516.
- Added 'system.method.get', 'ui.current_view.set' and 'group.insert'
  commands.
- Enabled different ratio settings for different groups of
  downloads.
- Added 'view.persistance' command that makes downloads inserted into
  that view persist across sessions. Only call on user-created views.
- Added 'ratio.*' commands that call the 'group.seeding.ratio.*'
  equivalents.
- Changed torrent::DownloadList::close_directly() so doesn't save the
  session if the underlying file/directory has been moved or
  removed. This change, in addition to calling 'd.set_directory=' before
  'execute=mv,...', as previously shown in the examples, will make
  rtorrent behave correctly when 'check_hash=no' is set.