feat: add new dangerous functions

Author: marcocesarato

src/Functions.php

@@ -42,6 +42,7 @@ class Functions
         'proc_open',
         'proc_terminate',
         'pcntl_exec',
+        'pcntl_fork',
         'inject_code',
         'apache_child_terminate',
         'apache_note',
@@ -62,6 +63,7 @@ class Functions
         'create_function',
         'exec',
         'pcntl_exec',
+        'pcntl_fork',
         'assert',
         'passthru',
         'create_function',