John Ericson 450dcf2c1b Remove HashType::Unknown ... Instead, `Hash` uses `std::optional<HashType>`. In the future, we may also make `Hash` itself require a known hash type, encoraging people to use `std::optional<Hash>` instead.		2020-06-02 15:52:13 +00:00
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nix-prefetch-url.cc	Remove HashType::Unknown	2020-06-02 15:52:13 +00:00