Block local addresses for rendezvous on RSOS servers

Build on the work in #8976 (moved) to block local addresses for rendezvous on RSOS servers.

We'll need to add to the function:

• tor_addr_is_local
• any local interface address on the RSOS
• any configured address on the RSOS

(This is very similar to #17027 (moved), I wonder if we could re-use that code?)