feat(retry): retry on h2 go away with no error

Author: joelwurtz

client/src/middleware/retry_closed_connection.rs

@@ -44,6 +44,17 @@ where
                         return Err(Error::H1(crate::h1::Error::Io(err)));
                     }
                 }
+                Err(Error::H2(crate::h2::Error::H2(err))) => {
+                    if !err.is_go_away() {
+                        return Err(Error::H2(crate::h2::Error::H2(err)));
+                    }
+
+                    let reason = err.reason().unwrap();
+
+                    if reason != h2::Reason::NO_ERROR {
+                        return Err(Error::H2(crate::h2::Error::H2(err)));
+                    }
+                }
                 Err(Error::H2(crate::h2::Error::Io(err))) => {
                     if err.kind() != io::ErrorKind::UnexpectedEof {
                         return Err(Error::H2(crate::h2::Error::Io(err)));