docs: Do not ask the user to change default Xdebug2 port (#642)

Author: zobo

README.md

@@ -23,7 +23,7 @@ This extension is a debug adapter between VS Code and [Xdebug](https://xdebug.or
    **_I highly recommend you make a simple `test.php` file, put a `phpinfo();` statement in there, then copy the output and paste it into the [Xdebug installation wizard](https://xdebug.org/wizard.php). It will analyze it and give you tailored installation instructions for your environment._** In short:
 
    - On Windows: [Download](https://xdebug.org/download.php) the appropriate precompiled DLL for your PHP version, architecture (64/32 Bit), thread safety (TS/NTS) and Visual Studio compiler version and place it in your PHP extension folder.
-   - On Linux: Either download the source code as a tarball or [clone it with git](https://xdebug.org/docs/install#source), then [compile it](https://xdebug.org/docs/install#compile).
+   - On Linux: Either download the source code as a tarball or [clone it with git](https://xdebug.org/docs/install#source), then [compile it](https://xdebug.org/docs/install#compile). Or see if your distribution already offers prebuilt packages.
 
 2. [Configure PHP to use Xdebug](https://xdebug.org/docs/install#configure-php) by adding `zend_extension=path/to/xdebug` to your php.ini. The path of your php.ini is shown in your `phpinfo()` output under "Loaded Configuration File".
 
@@ -41,7 +41,7 @@ This extension is a debug adapter between VS Code and [Xdebug](https://xdebug.or
    ```ini
    xdebug.remote_enable = 1
    xdebug.remote_autostart = 1
-   xdebug.remote_port = 9003
+   xdebug.remote_port = 9000
    ```
 
    There are other ways to tell Xdebug to connect to a remote debugger, like cookies, query parameters or browser extensions. I recommend `remote_autostart` (Xdebug v2)/`start_with_request` (Xdebug v3) because it "just works". There are also a variety of other options, like the port, please see the [Xdebug documentation on remote debugging](https://xdebug.org/docs/remote#starting) for more information. Please note that the default Xdebug port changed between Xdebug v2 to v3 from 9000 to 9003.
@@ -61,6 +61,8 @@ In your project, go to the debugger and hit the little gear icon and choose _PHP
 - **Launch Built-in web server**
   This configuration starts the PHP built-in web server on a random port and opens the browser with the `serverReadyAction` directive. The port is random (localhost:0) but can be changed to a desired fixed port (ex: localhost:8080). If a router script is needed, add it with `program` directive. Additional PHP/Xdebug directives trigger debugging on every page load.
 
+There are also configurations for Xdebug v2 (Legacy) installations.
+
 More general information on debugging with VS Code can be found on https://code.visualstudio.com/docs/editor/debugging.
 
 #### Supported launch.json settings: