Switch to next-gen onion services

Hi. Tor's recent releases now support their next-gen onion services with better crypto. Can you please consider switching to them by default?

cc/ @adrelanos

The issue names no files, tests, or entry points. Start by locating ZeroNet’s Tor integration and confirming how next-gen onion services are supported; done would mean switching the default behavior, but the required scope and compatibility details need clarification.

索引モデルが issue の本文から書いたものです。