Merge pull request #3727 from fufesou/refact/peer_info_platform_additions

better peer info

src/server/connection.rs

@@ -843,14 +843,15 @@ impl Connection {
             pi.hostname = DEVICE_NAME.lock().unwrap().clone();
             pi.platform = "Android".into();
         }
-
+        let mut platform_additions = serde_json::Map::new();
         #[cfg(target_os = "linux")]
         {
-            pi.platform_additions = format!(r#"
-                {{
-                    "is_wayland": {}
-                }}
-            "#, crate::platform::current_is_wayland());
+            if crate::platform::current_is_wayland() {
+                platform_additions.insert("is_wayland".into(), json!(true));
+            }
+        }
+        if !platform_additions.is_empty() {
+            pi.platform_additions = serde_json::to_string(&platform_additions).unwrap_or("".into());
         }
 
         #[cfg(feature = "hwcodec")]