Update docs

- Link to released versions of .reg files on GitHub

Author: hwdsl2

docs/clients-zh.md

@@ -264,21 +264,21 @@ Fedora 28（和更新版本）和 CentOS 8/7 用户可以使用 [IPsec/XAuth](cl
 
 要解决此错误，在首次连接之前需要[修改一次注册表](https://documentation.meraki.com/MX-Z/Client_VPN/Troubleshooting_Client_VPN#Windows_Error_809)，以解决 VPN 服务器 和/或 客户端与 NAT （比如家用路由器）的兼容问题。请下载并导入下面的 `.reg` 文件，或者打开 [提升权限命令提示符](http://www.cnblogs.com/xxcanghai/p/4610054.html) 并运行以下命令。**完成后必须重启计算机。**
 
-- 适用于 Windows Vista, 7, 8, 10 和 11 ([下载 .reg 文件](https://dl.ls20.com/reg-files/v1/Fix_VPN_Error_809_Windows_Vista_7_8_10_Reboot_Required.reg))
+- 适用于 Windows Vista, 7, 8, 10 和 11 ([下载 .reg 文件](https://github.com/hwdsl2/vpn-extras/releases/latest/download/Fix_VPN_Error_809_Windows_Vista_7_8_10_Reboot_Required.reg))
 
   ```console
   REG ADD HKLM\SYSTEM\CurrentControlSet\Services\PolicyAgent /v AssumeUDPEncapsulationContextOnSendRule /t REG_DWORD /d 0x2 /f
   ```
 
-- 仅适用于 Windows XP ([下载 .reg 文件](https://dl.ls20.com/reg-files/v1/Fix_VPN_Error_809_Windows_XP_ONLY_Reboot_Required.reg))
+- 仅适用于 Windows XP ([下载 .reg 文件](https://github.com/hwdsl2/vpn-extras/releases/latest/download/Fix_VPN_Error_809_Windows_XP_ONLY_Reboot_Required.reg))
 
   ```console
   REG ADD HKLM\SYSTEM\CurrentControlSet\Services\IPSec /v AssumeUDPEncapsulationContextOnSendRule /t REG_DWORD /d 0x2 /f
   ```
 
 另外，某些个别的 Windows 系统配置禁用了 IPsec 加密，此时也会导致连接失败。要重新启用它，可以运行以下命令并重启。
 
-- 适用于 Windows XP, Vista, 7, 8, 10 和 11 ([下载 .reg 文件](https://dl.ls20.com/reg-files/v1/Fix_VPN_Error_809_Allow_IPsec_Reboot_Required.reg))
+- 适用于 Windows XP, Vista, 7, 8, 10 和 11 ([下载 .reg 文件](https://github.com/hwdsl2/vpn-extras/releases/latest/download/Fix_VPN_Error_809_Allow_IPsec_Reboot_Required.reg))
 
   ```console
   REG ADD HKLM\SYSTEM\CurrentControlSet\Services\RasMan\Parameters /v ProhibitIpSec /t REG_DWORD /d 0x0 /f

docs/clients.md

@@ -263,21 +263,21 @@ First check [here](https://github.com/nm-l2tp/NetworkManager-l2tp/wiki/Prebuilt-
 
 To fix this error, a [one-time registry change](https://documentation.meraki.com/MX-Z/Client_VPN/Troubleshooting_Client_VPN#Windows_Error_809) is required because the VPN server and/or client is behind NAT (e.g. home router). Download and import the `.reg` file below, or run the following from an [elevated command prompt](http://www.winhelponline.com/blog/open-elevated-command-prompt-windows/). **You must reboot your PC when finished.**
 
-- For Windows Vista, 7, 8, 10 and 11 ([download .reg file](https://dl.ls20.com/reg-files/v1/Fix_VPN_Error_809_Windows_Vista_7_8_10_Reboot_Required.reg))
+- For Windows Vista, 7, 8, 10 and 11 ([download .reg file](https://github.com/hwdsl2/vpn-extras/releases/latest/download/Fix_VPN_Error_809_Windows_Vista_7_8_10_Reboot_Required.reg))
 
   ```console
   REG ADD HKLM\SYSTEM\CurrentControlSet\Services\PolicyAgent /v AssumeUDPEncapsulationContextOnSendRule /t REG_DWORD /d 0x2 /f
   ```
 
-- For Windows XP ONLY ([download .reg file](https://dl.ls20.com/reg-files/v1/Fix_VPN_Error_809_Windows_XP_ONLY_Reboot_Required.reg))
+- For Windows XP ONLY ([download .reg file](https://github.com/hwdsl2/vpn-extras/releases/latest/download/Fix_VPN_Error_809_Windows_XP_ONLY_Reboot_Required.reg))
 
   ```console
   REG ADD HKLM\SYSTEM\CurrentControlSet\Services\IPSec /v AssumeUDPEncapsulationContextOnSendRule /t REG_DWORD /d 0x2 /f
   ```
 
 Although uncommon, some Windows systems disable IPsec encryption, causing the connection to fail. To re-enable it, run the following command and reboot your PC.
 
-- For Windows XP, Vista, 7, 8, 10 and 11 ([download .reg file](https://dl.ls20.com/reg-files/v1/Fix_VPN_Error_809_Allow_IPsec_Reboot_Required.reg))
+- For Windows XP, Vista, 7, 8, 10 and 11 ([download .reg file](https://github.com/hwdsl2/vpn-extras/releases/latest/download/Fix_VPN_Error_809_Allow_IPsec_Reboot_Required.reg))
 
   ```console
   REG ADD HKLM\SYSTEM\CurrentControlSet\Services\RasMan\Parameters /v ProhibitIpSec /t REG_DWORD /d 0x0 /f

docs/ikev2-howto-zh.md

@@ -157,7 +157,7 @@ Windows 8, 10 和 11 用户可以自动导入 IKEv2 配置：
 
 1. （**此步骤为必须，如果你手动创建了 VPN 连接**）为 IKEv2 启用更强的加密算法，通过修改一次注册表来实现。请下载并导入下面的 `.reg` 文件，或者打开提升权限命令提示符并运行以下命令。更多信息请看 [这里](https://wiki.strongswan.org/projects/strongswan/wiki/WindowsClients#AES-256-CBC-and-MODP2048)。
 
-   - 适用于 Windows 7, 8, 10 和 11 ([下载 .reg 文件](https://dl.ls20.com/reg-files/v1/Enable_Stronger_Ciphers_for_IKEv2_on_Windows.reg))
+   - 适用于 Windows 7, 8, 10 和 11 ([下载 .reg 文件](https://github.com/hwdsl2/vpn-extras/releases/latest/download/Enable_Stronger_Ciphers_for_IKEv2_on_Windows.reg))
 
      ```console
      REG ADD HKLM\SYSTEM\CurrentControlSet\Services\RasMan\Parameters /v NegotiateDH2048_AES256 /t REG_DWORD /d 0x1 /f

docs/ikev2-howto.md

@@ -157,7 +157,7 @@ Alternatively, you may manually import IKEv2 configuration. These steps apply to
 
 1. (**This step is required if you manually created the VPN connection**) Enable stronger ciphers for IKEv2 with a one-time registry change. Download and import the `.reg` file below, or run the following from an elevated command prompt. Read more [here](https://wiki.strongswan.org/projects/strongswan/wiki/WindowsClients#AES-256-CBC-and-MODP2048).
 
-   - For Windows 7, 8, 10 and 11 ([download .reg file](https://dl.ls20.com/reg-files/v1/Enable_Stronger_Ciphers_for_IKEv2_on_Windows.reg))
+   - For Windows 7, 8, 10 and 11 ([download .reg file](https://github.com/hwdsl2/vpn-extras/releases/latest/download/Enable_Stronger_Ciphers_for_IKEv2_on_Windows.reg))
 
      ```console
      REG ADD HKLM\SYSTEM\CurrentControlSet\Services\RasMan\Parameters /v NegotiateDH2048_AES256 /t REG_DWORD /d 0x1 /f