message: catch oversized files
diff: @@ -115,12 +115,12 @@ pub fn validate_file_uploads(pairs: Vec<KeyValuePair>) -> Result<(), failure::Er
  KEY_MAX_SIZE
  );
  }
  - if pair.key.len() > KEY_MAX_SIZE {
  - failure::bail!(
  + if pair.value.len() > VALUE_MAX_SIZE {
  + format_err(
  "File `{}` exceeds the maximum value size limit of {} bytes",
  pair.key,
  VALUE_MAX_SIZE
  - );
  + )
  }
  }
  Ok(())
  