Update all common headers for the new Header trait split

src/header/common/location.rs

@@ -1,14 +1,14 @@
-use header::Header;
+use header::{Header, HeaderFormat};
 use std::fmt::{mod, Show};
 use super::util::from_one_raw_str;
 
 /// The `Location` header.
 ///
-/// The Location response-header field is used to redirect the recipient to 
-/// a location other than the Request-URI for completion of the request or identification 
-/// of a new resource. For 201 (Created) responses, the Location is that of the new 
-/// resource which was created by the request. For 3xx responses, the location SHOULD 
-/// indicate the server's preferred URI for automatic redirection to the resource. 
+/// The Location response-header field is used to redirect the recipient to
+/// a location other than the Request-URI for completion of the request or identification
+/// of a new resource. For 201 (Created) responses, the Location is that of the new
+/// resource which was created by the request. For 3xx responses, the location SHOULD
+/// indicate the server's preferred URI for automatic redirection to the resource.
 /// The field value consists of a single absolute URI.
 ///
 /// Currently is just a String, but it should probably become a better type,
@@ -24,7 +24,9 @@ impl Header for Location {
     fn parse_header(raw: &[Vec<u8>]) -> Option<Location> {
         from_one_raw_str(raw).map(|s| Location(s))
     }
+}
 
+impl HeaderFormat for Location {
     fn fmt_header(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
         let Location(ref value) = *self;
         value.fmt(fmt)