Various spec fixes to dir-spec, rend-spec-v3
There are a few commits fixing various things in some of the specs, ranging from implementation mismatches to wording here: https://github.com/FiloSottile/torspec/compare/53b7dee30b1044ae401338a9ce4b6c76e1c431e1...ab22bd1dce3b62b6120300fdead958c6924fe553 The commit messages offer more rationale. **Trac**: **Username**: filippo
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