include the unsupported http version number in the ensure message

Author: jbr

src/server/decode.rs

@@ -63,7 +63,7 @@ where
 
     let version = httparse_req.version;
     let version = version.ok_or_else(|| format_err!("No version found"))?;
-    ensure_eq!(version, HTTP_1_1_VERSION, "Unsupported HTTP version");
+    ensure_eq!(version, HTTP_1_1_VERSION, "Unsupported HTTP version 1.{}", version);
 
     let mut req = Request::new(Method::from_str(method)?, uri);
     for header in httparse_req.headers.iter() {