Conrad Hoffmann ac9af45270 Dedicated type for conditional match header fields
The `If-Match` and `If-None-Match` conditional headers can have either a
wildcard or a (quoted) ETag as value. However, the ETag _could_ be a
literal `*`, so care must be taken to allow these cases to be
distinguished. The values of these headers have to be handled by the
backend, so export a type that facilitates working with these values.
2022-11-22 11:58:13 +01:00
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