I just searched for rtorrent using the Package Search page, and no results were found for 15.0. So I started building it ... the latest version also requires a newer libtorrent.
Anyway, of course, it is in the repositories. But Package Search doesn't seem to know about it, nor libtorrent.
package search
Re: package search
Ah, that's because I forgot to include our extra repository for 15.0 in the frontend. Easy fix, I'll get to that. Thanks!