fix(http): Consume entire chunked encoding message

The trailing newline otherwise breaks keepalive after a chunked request.

src/http/h1.rs

@@ -591,12 +591,17 @@ impl<R: Read> Read for HttpReader<R> {
                 trace!("Chunked read, remaining={:?}", rem);
 
                 if rem == 0 {
+                    if opt_remaining.is_none() {
+                        try!(eat(body, LINE_ENDING.as_bytes()));
+                    }
+
                     *opt_remaining = Some(0);
 
                     // chunk of size 0 signals the end of the chunked stream
                     // if the 0 digit was missing from the stream, it would
                     // be an InvalidInput error instead.
                     trace!("end of chunked");
+
                     return Ok(0)
                 }
 
@@ -1098,6 +1103,19 @@ mod tests {
         assert_eq!(r.read(&mut buf).unwrap(), 0);
     }
 
+    #[test]
+    fn test_read_chunked_fully_consumes() {
+        let mut r = super::HttpReader::ChunkedReader(MockStream::with_input(b"0\r\n\r\n"), None);
+        let mut buf = [0; 1];
+        assert_eq!(r.read(&mut buf).unwrap(), 0);
+        assert_eq!(r.read(&mut buf).unwrap(), 0);
+
+        match r {
+            super::HttpReader::ChunkedReader(mut r, _) => assert_eq!(r.read(&mut buf).unwrap(), 0),
+            _ => unreachable!(),
+        }
+    }
+
     #[test]
     fn test_message_get_incoming_invalid_content_length() {
         let raw = MockStream::with_input(