boost 1.86 + add cmake + fix warnings

[milahu]

merge #51 - reword to Fix compilation with boost 1.86

cherry-pick #5 - add cmake, fix warnings

feat: x-pollinate: support hostnames

feat: add option print-stats-interval

todo: also merge #46 for boost 1.66

fixme: cmake 3.31.7 prints this warning

CMake Warning (dev) at CMakeLists.txt:11 (find_package):
  Policy CMP0167 is not set: The FindBoost module is removed.  Run "cmake
  --help-policy CMP0167" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

packaged in bittorrent-bootstrap-dht.nix