allow use websocket (#11677)

1. Enable the RustDesk client to use WebSocket for either controlling or being controlled.
2. Fix TCP sending `register_pk` frequently

Note:
1. Because hbb_common directly uses `use_ws` to read config directly, rustdesk also directly reads config

Signed-off-by: 21pages <sunboeasy@gmail.com>

src/lang/cn.rs

@@ -694,5 +694,7 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("download-new-version-failed-tip", "下载失败，您可以重试或者点击\"下载\"按钮，从发布网址下载，并手动升级。"),
         ("Auto update", ""),
         ("update-failed-check-msi-tip", "安装方式检测失败。请点击\"下载\"按钮，从发布网址下载，并手动升级。"),
+        ("websocket_tip", "使用 WebSocket 时，仅支持中继连接。"),
+        ("Use WebSocket", "使用 WebSocket"),
     ].iter().cloned().collect();
 }