Update docs

Author: hwdsl2

README-zh.md

@@ -359,7 +359,7 @@ https://gitlab.com/hwdsl2/setup-ipsec-vpn/-/raw/master/extras/vpnupgrade.sh
 如果无法下载，打开 [vpnupgrade.sh](extras/vpnupgrade.sh)，然后点击右边的 `Raw` 按钮。按快捷键 `Ctrl/Cmd+A` 全选，`Ctrl/Cmd+C` 复制，然后粘贴到你喜欢的编辑器。
 </details>
 
-当前支持的 Libreswan 最新版本是 `5.2`。查看已安装版本：`ipsec --version`。
+当前支持的 Libreswan 最新版本是 `5.3`。查看已安装版本：`ipsec --version`。
 
 **注：** `xl2tpd` 可以使用系统的软件包管理器进行更新，例如 Ubuntu/Debian 上的 `apt-get`。
 

README.md

@@ -359,7 +359,7 @@ https://gitlab.com/hwdsl2/setup-ipsec-vpn/-/raw/master/extras/vpnupgrade.sh
 If you are unable to download, open [vpnupgrade.sh](extras/vpnupgrade.sh), then click the `Raw` button on the right. Press `Ctrl/Cmd+A` to select all, `Ctrl/Cmd+C` to copy, then paste into your favorite editor.
 </details>
 
-The latest supported Libreswan version is `5.2`. Check installed version: `ipsec --version`.
+The latest supported Libreswan version is `5.3`. Check installed version: `ipsec --version`.
 
 **Note:** `xl2tpd` can be updated using your system's package manager, such as `apt-get` on Ubuntu/Debian.
 

docs/advanced-usage-zh.md

@@ -412,7 +412,7 @@ VPN 服务器搭建完成后，可以通过部署 Google BBR 拥塞控制算法
 
 ## 授权协议
 
-版权所有 (C) 2021-2024 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
+版权所有 (C) 2021-2025 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
 
 [![Creative Commons License](https://i.creativecommons.org/l/by-sa/3.0/88x31.png)](http://creativecommons.org/licenses/by-sa/3.0/)   
 这个项目是以 [知识共享署名-相同方式共享3.0](http://creativecommons.org/licenses/by-sa/3.0/) 许可协议授权。   

docs/advanced-usage.md

@@ -413,7 +413,7 @@ For detailed deployment methods, please refer to [this document](bbr.md).
 
 ## License
 
-Copyright (C) 2021-2024 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
+Copyright (C) 2021-2025 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
 
 [![Creative Commons License](https://i.creativecommons.org/l/by-sa/3.0/88x31.png)](http://creativecommons.org/licenses/by-sa/3.0/)   
 This work is licensed under the [Creative Commons Attribution-ShareAlike 3.0 Unported License](http://creativecommons.org/licenses/by-sa/3.0/)  

docs/clients-xauth-zh.md

@@ -168,7 +168,7 @@ Fedora 28 （和更新版本）和 CentOS 8/7 用户可以使用 `yum` 安装 `N
 
 注： 这个协议仅适用于本文档。
 
-版权所有 (C) 2016-2024 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
+版权所有 (C) 2016-2025 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
 受到 [Joshua Lund 的工作](https://github.com/StreisandEffect/streisand/blob/6aa6b6b2735dd829ca8c417d72eb2768a89b6639/playbooks/roles/l2tp-ipsec/templates/instructions.md.j2) 的启发
 
 本程序为自由软件，在自由软件联盟发布的[ GNU 通用公共许可协议](https://www.gnu.org/licenses/gpl.html)的约束下，你可以对其进行再发布及修改。协议版本为第三版或（随你）更新的版本。

docs/clients-xauth.md

@@ -168,7 +168,7 @@ Other Linux users can connect using [IPsec/L2TP](clients.md#linux) mode.
 
 Note: This license applies to this document only.
 
-Copyright (C) 2016-2024 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
+Copyright (C) 2016-2025 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
 Inspired by [the work of Joshua Lund](https://github.com/StreisandEffect/streisand/blob/6aa6b6b2735dd829ca8c417d72eb2768a89b6639/playbooks/roles/l2tp-ipsec/templates/instructions.md.j2)
 
 This program is free software: you can redistribute it and/or modify it under the terms of the [GNU General Public License](https://www.gnu.org/licenses/gpl.html) as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

docs/clients-zh.md

@@ -645,7 +645,7 @@ Debian 用户：运行 `uname -r` 检查你的服务器的 Linux 内核版本。
 
 注： 这个协议仅适用于本文档。
 
-版权所有 (C) 2016-2024 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
+版权所有 (C) 2016-2025 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
 受到 [Joshua Lund 的工作](https://github.com/StreisandEffect/streisand/blob/6aa6b6b2735dd829ca8c417d72eb2768a89b6639/playbooks/roles/l2tp-ipsec/templates/instructions.md.j2) 的启发
 
 本程序为自由软件，在自由软件联盟发布的[ GNU 通用公共许可协议](https://www.gnu.org/licenses/gpl.html)的约束下，你可以对其进行再发布及修改。协议版本为第三版或（随你）更新的版本。

docs/clients.md

@@ -643,7 +643,7 @@ To fix the issue with IPsec/L2TP mode, you may switch to the standard Linux kern
 
 Note: This license applies to this document only.
 
-Copyright (C) 2016-2024 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
+Copyright (C) 2016-2025 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
 Inspired by [the work of Joshua Lund](https://github.com/StreisandEffect/streisand/blob/6aa6b6b2735dd829ca8c417d72eb2768a89b6639/playbooks/roles/l2tp-ipsec/templates/instructions.md.j2)
 
 This program is free software: you can redistribute it and/or modify it under the terms of the [GNU General Public License](https://www.gnu.org/licenses/gpl.html) as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

docs/ikev2-howto-zh.md

@@ -1279,7 +1279,7 @@ sudo ikev2.sh --removeikev2
 
 ## 授权协议
 
-版权所有 (C) 2016-2024 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
+版权所有 (C) 2016-2025 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
 
 [![Creative Commons License](https://i.creativecommons.org/l/by-sa/3.0/88x31.png)](http://creativecommons.org/licenses/by-sa/3.0/)   
 这个项目是以 [知识共享署名-相同方式共享3.0](http://creativecommons.org/licenses/by-sa/3.0/) 许可协议授权。   

docs/ikev2-howto.md

@@ -1379,7 +1379,7 @@ To manually remove IKEv2 from the VPN server, but keep the [IPsec/L2TP](clients.
 
 ## License
 
-Copyright (C) 2016-2024 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
+Copyright (C) 2016-2025 [Lin Song](https://github.com/hwdsl2) [![View my profile on LinkedIn](https://static.licdn.com/scds/common/u/img/webpromo/btn_viewmy_160x25.png)](https://www.linkedin.com/in/linsongui)   
 
 [![Creative Commons License](https://i.creativecommons.org/l/by-sa/3.0/88x31.png)](http://creativecommons.org/licenses/by-sa/3.0/)   
 This work is licensed under the [Creative Commons Attribution-ShareAlike 3.0 Unported License](http://creativecommons.org/licenses/by-sa/3.0/)