Chutney's single-onion-ipv6-md test fails on master
When we merged legacy/trac#27215 (moved), it changed the default HiddenServiceVersion from 2 to 3.
Chutney expects the default to be v2, so single-onion-ipv6-md fails with an error, because IPv6-only v3 single onion services are not yet supported.
I have a patch to fix this issue. I'll attach it to this ticket.
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