hmac: Missing CHANGELOG entry for NewMac::new_from_slice

[str4d]

It looks like hmac::NewMac::new_varkey was renamed to hmac::NewMac::new_from_slice in 0.11.

[tarcieri]

I suppose we could add a summary of what changed upstream in the crypto-mac crate to each of the MAC crates

[str4d]

Oh, then move this issue there, because it's not documented there either.

[str4d]

Aha, I see: it was changed for both cipher and crypto-mac (RustCrypto/traits#442), but only documented in the changelog for cipher.

[str4d]

Opened RustCrypto/traits#626.