As per summary — older versions are going to be masked, so you're losing your stable. Thanks.
Let's go for =net-libs/rb_libtorrent-0.16.5 as new stable. I will add other arches as soon as bug 437356 is resolved.
ppc64 stable
lets do it
amd64 stable
ppc stable
x86 stable
sparc stable
arm stable. Last arch, closing