Make :status in requests be a stream error

src/frame/headers.rs

@@ -575,6 +575,11 @@ impl Pseudo {
         }
     }
 
+    #[cfg(feature = "unstable")]
+    pub fn set_status(&mut self, value: StatusCode) {
+        self.status = Some(value);
+    }
+
     pub fn set_scheme(&mut self, scheme: uri::Scheme) {
         let bytes_str = match scheme.as_str() {
             "http" => BytesStr::from_static("http"),

src/server.rs

@@ -1410,10 +1410,8 @@ impl proto::Peer for Peer {
             malformed!("malformed headers: missing method");
         }
 
-        // Specifying :status for a request is a protocol error
         if pseudo.status.is_some() {
-            tracing::trace!("malformed headers: :status field on request; PROTOCOL_ERROR");
-            return Err(Error::library_go_away(Reason::PROTOCOL_ERROR));
+            malformed!("malformed headers: :status field on request");
         }
 
         // Convert the URI