minor docs updates

Author: superstes

docs/source/plugins/firewall_netfilter.rst

@@ -74,6 +74,12 @@ If we were not able to parse any match from the rule-config - the rule will be s
 
 If this happens you will see a warning at runtime! (:code:`Unsupported rule`)
 
+.. warning::
+
+    The plugin does not validate the syntax of the config-export you provide!
+
+    You may encounter unexpected errors when manually modifying it!
+
 Unsupported Expressions
 =======================
 

docs/source/plugins/system_linux.rst

@@ -56,3 +56,14 @@ Source Code
 * **System Config**: `system/system_linux_netfilter.py <https://github.com/O-X-L/firewall-testing-framework/blob/latest/src/firewall_test/plugins/system/system_linux_netfilter.py>`_
 
 * **Config Parsing**: `translate/linux.py <https://github.com/O-X-L/firewall-testing-framework/tree/latest/src/firewall_test/plugins/translate/linux.py>`_
+
+----
+
+Config-Parsing
+##############
+
+.. warning::
+
+    The plugin does not validate the syntax of the config-export you provide!
+
+    You may encounter unexpected errors when manually modifying it!