Replace keygen with CyberChef (#1677)

.env.example

@@ -3,7 +3,7 @@ CLIENT_PATH=./client
 # Updates NET_VERSION in CMakeVariables.txt
 NET_VERSION=171022
 # make sure this is a long random string
-# grab a "SHA 256-bit Key" from here: https://keygen.io/
+# generate a "SHA 256-bit Key" from here: https://gchq.github.io/CyberChef/#recipe=Pseudo-Random_Number_Generator(256,'Hex')
 ACCOUNT_MANAGER_SECRET=
 # Should be the externally facing IP of your server host
 EXTERNAL_IP=localhost

README.md

@@ -371,7 +371,7 @@ at once. For that:
 - Download the [.env.example](.env.example) file and place it next to `client` with the file name `.env`
   - You may get warnings that this name starts with a dot, acknowledge those, this is intentional. Depending on your operating system, you may need to activate showing hidden files (e.g. Ctrl-H in Gnome on Linux) and/or file extensions ("File name extensions" in the "View" tab on Windows).
   - Update the `ACCOUNT_MANAGER_SECRET` and `MARIADB_PASSWORD` with strong random passwords.
-    - Use a password generator like <https://keygen.io>
+    - Use a password generator <https://gchq.github.io/CyberChef/#recipe=Pseudo-Random_Number_Generator(256,'Hex')>
     - Avoid `:` and `@` characters
     - Once the database user is created, changing the password will not update it, so the server will just fail to connect.
   - Set `EXTERNAL_IP` to your LAN IP or public IP if you want to host the game for friends & family