(fix) Replace find_equiv with a lifetime transmute.

src/header/mod.rs

@@ -145,7 +145,10 @@ impl Headers {
     /// let raw_content_type = headers.get_raw("content-type");
     /// ```
     pub fn get_raw(&self, name: &str) -> Option<&[Vec<u8>]> {
-        self.data.find_equiv(&CaseInsensitive(name)).and_then(|item| {
+        self.data
+            // FIXME(reem): Find a better way to do this lookup without find_equiv.
+            .get(&CaseInsensitive(Slice(unsafe { mem::transmute::<&str, &str>(name) })))
+            .and_then(|item| {
                 let lock = item.read();
                 if let Some(ref raw) = lock.raw {
                     return unsafe { mem::transmute(Some(raw[])) };