message: Remove similar names lint override
  This one is easy.
diff: @@ -67,7 +67,6 @@ impl SelfEncrypt {
  ///
  /// # Errors
  /// Failure to protect using NSS AEAD APIs produces an error.
  - #[allow(clippy::similar_names)] // aad is similar to aead
  pub fn seal(&self, aad: &[u8], plaintext: &[u8]) -> Res<Vec<u8>> {
  // Format is:
  // struct {
  @@ -78,8 +77,8 @@ impl SelfEncrypt {
  // };
  // AAD covers the entire header, plus the value of the AAD parameter that is provided.
  let salt = random(Self::SALT_LENGTH);
  - let aead = self.make_aead(&self.key, &salt)?;
  - let encoded_len = 2 + salt.len() + plaintext.len() + aead.expansion();
  + let cipher = self.make_aead(&self.key, &salt)?;
  + let encoded_len = 2 + salt.len() + plaintext.len() + cipher.expansion();
  let mut enc = Encoder::with_capacity(encoded_len);
  enc.encode_byte(Self::VERSION);
  @@ -92,7 +91,7 @@ impl SelfEncrypt {
  let offset = enc.len();
  let mut output: Vec<u8> = enc.into();
  output.resize(encoded_len, 0);
  - aead.encrypt(0, &extended_aad, plaintext, &mut output[offset..])?;
  + cipher.encrypt(0, &extended_aad, plaintext, &mut output[offset..])?;
  qtrace!(
  ["SelfEncrypt"],
  "seal {} {} -> {}",
  