All versions of net-p2p/rtorrent in the tree contain a deprecated option --chuid in their init script (line 22). This provides a warning message upon starting the rtorrent daemon: WARNING: -c/--chuid is deprecated and will be removed in the future, please use -u/--user instead
+ 07 Nov 2011; Jeremy Olexa <darkside@gentoo.org> files/rtorrentd.init: + remove deprecated init option, bug 384541 (no revbump on purpose)