net-p2p/{lib,r}torrent: Update to 0.16.24

This release includes various bugfixes and minor improvements as part of
a stable series of releases.

ChangeLog: https://github.com/rakshasa/rtorrent/releases/tag/v0.16.24
MFH: 2026Q3
(cherry picked from commit a64f533b3bd72f2bb2546d3cf9382c1b667d6082)