Remove the need for PHP for Apache2, thank you https://serverfault.com/a/938323/336084

Stateless-Mode.md

@@ -40,37 +40,25 @@ Configure your webserver to respond statelessly to challenges for a given accoun
      respond @achallenge "{re.ch.1}.6fXAG9VyG0IahirPEU2ZerUtItW2DHzDzD9wZaEKpqd"
     ```
     ### APACHE
+
+    _Tested on Apache 2.4.61_  
+
     Add something similar to your `httpd.conf`:
     ```apache
-    LoadModule php7_module libexec/apache2/libphp7.so
     ...
     <VirtualHost *:80>
-        ...
-        <IfModule php7_module>
-            AddType application/x-httpd-php .php
-            AddType application/x-httpd-php-source .phps
-            <IfModule dir_module>
-                DirectoryIndex index.html index.php
-            </IfModule>
-        </IfModule>
         ...
         <Directory "/PATH/TO/WWW/ROOT/.well-known/acme-challenge/">
             RewriteEngine On
-            RewriteRule "^[-_a-zA-Z0-9]+$" "index.php"
+            RewriteRule "^([-_a-zA-Z0-9]+)$" "$1" [E=challenge:$1]
+            ErrorDocument 200 "%{ENV:challenge}.6fXAG9VyG0IahirPEU2ZerUtItW2DHzDzD9wZaEKpqd"
+            RewriteRule ^ - [L,R=200]
         </Directory>
         ...
     </VirtualHost>
     ...
     ```
-    Then add `/PATH/TO/WWW/ROOT/.well-known/acme-challenge/index.php`:
-    ```php
-    <?php
-    header("Content-Type: text/plain");
-    $token = array_pop(explode('/',$_SERVER['REQUEST_URI']));
-    echo "$token.6fXAG9VyG0IahirPEU2ZerUtItW2DHzDzD9wZaEKpqd";
-    ?>
-    ```
-    _NOTE that this approach uses PHP but something similar could be done with CGI, Perl, Ruby or pretty much any other server-side language._
+
     ### HAPROXY
     Add the http-request return rule to your configuration:
     ```haproxy