argon2: refactor Params handling
#213
Merged
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Uses
Paramsinternally within theArgon2context, refactoring all of the logic related to parameter handling into that type/module:Argon2::newto accept explicitversionandparamsArgon2::newandArgon2::new_with_secret, making the former infallible.Paramsstruct opaque with field accessors, and ensures it always represents a valid set of parameters.versionparameter fromhash_password_into, using the one supplied toArgon2::new.