message: feat(headers): add HeaderView.raw()
  Add HeaderView.raw() which behaves identically to Headers.get_raw().
diff: @@ -589,6 +589,12 @@ impl<'a> HeaderView<'a> {
  pub fn value_string(&self) -> String {
  ValueString(self.1).to_string()
  }
  +
  + /// Access the raw value of the header.
  + #[inline]
  + pub fn raw(&self) -> &Raw {
  + self.1.raw()
  + }
  }
  impl<'a> fmt::Display for HeaderView<'a> {
  @@ -913,6 +919,17 @@ mod tests {
  }
  }
  + #[test]
  + fn test_header_view_raw() {
  + let mut headers = Headers::new();
  + headers.set_raw("foo", vec![b"one".to_vec(), b"two".to_vec()]);
  + for header in headers.iter() {
  + assert_eq!(header.name(), "foo");
  + let values: Vec<&[u8]> = header.raw().iter().collect();
  + assert_eq!(values, vec![b"one", b"two"]);
  + }
  + }
  +
  #[test]
  fn test_eq() {
  let mut headers1 = Headers::new();
  