Miscellaneous fixes and test updates for all the other changes

- http::LINE_ENDING is now an &'static str

src/lib.rs

@@ -145,12 +145,9 @@ pub use method::Method::{Get, Head, Post, Delete};
 pub use status::StatusCode::{Ok, BadRequest, NotFound};
 pub use server::Server;
 
-use std::fmt;
 use std::error::{Error, FromError};
 use std::io::IoError;
 
-use std::rt::backtrace;
-
 use self::HttpError::{HttpMethodError, HttpUriError, HttpVersionError,
                       HttpHeaderError, HttpStatusError, HttpIoError};
 
@@ -160,23 +157,6 @@ macro_rules! todo(
     })
 );
 
-// FIXME(reem): Uncomment this when backtrace::write can write to a fmt::Formatter.
-// #[allow(dead_code)]
-// struct Trace;
-//
-// impl fmt::Show for Trace {
-//     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-//         let _ = backtrace::write(fmt);
-//         Result::Ok(())
-//     }
-// }
-//
-// macro_rules! trace(
-//     ($($arg:tt)*) => (if cfg!(not(ndebug)) {
-//         log!(5, "{}\n{}", format_args!($($arg)*), ::Trace)
-//     })
-// );
-
 macro_rules! inspect(
     ($name:expr, $value:expr) => ({
         let v = $value;