single onion v3 IPv6 intro circuit BUG() warnings
Looks like some of our assertions are wrong in single onion IPv6 mode, but chutney still succeeds:
Warning: Bug: Tor 0.4.3.0-alpha-dev (git-d616214e474084fd): Non-fatal assertion !(!hs_ident_intro_circ_is_valid(circ->hs_ident)) failed in intro_circ_is_ok at src/feature/hs/hs_client.c:491. Stack trace: (on Tor 0.4.3.0-alpha-dev d616214e474084fd) Number: 1
Warning: Bug: Tor 0.4.3.0-alpha-dev (git-d616214e474084fd): Non-fatal assertion !(desc == NULL) failed in setup_intro_circ_auth_key at src/feature/hs/hs_client.c:685. Stack trace: (on Tor 0.4.3.0-alpha-dev d616214e474084fd) Number: 1
Warning: tor_bug_occurred_: Bug: src/feature/hs/hs_client.c:491: intro_circ_is_ok: Non-fatal assertion !(!hs_ident_intro_circ_is_valid(circ->hs_ident)) failed. (Future instances of this warning will be silenced.) (on Tor 0.4.3.0-alpha-dev d616214e474084fd) Number: 1
Warning: tor_bug_occurred_: Bug: src/feature/hs/hs_client.c:685: setup_intro_circ_auth_key: Non-fatal assertion !(desc == NULL) failed. (Future instances of this warning will be silenced.) (on Tor 0.4.3.0-alpha-dev d616214e474084fd) Number: 1