doc: more stuff regarding protocol and domo_node

doc/domo_node/config.md

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+You can set up the node in very cool ways.
+
+# `node.id` (optional)
+This will set the node's id.  
+Your app may not start if the id is already taken.
+> tip: `0xFF------` is a free subnet in `domo_node`.

doc/domo_node/devnotes.md

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+# Todo
+
+- [ ] `0xFF------` subnet should be free to use without interference.

doc/domo_node/node_types.md

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+The `domo_node` implementation is quite limited.
+It's not made to be used standalone but rather in combination with other tools and use drivers.
+
+# The Master node (`master`)
+Of these, there can only be one.  
+The job of a master node is rather complex.
+
+## Forwarding packets
+The most straight forward job of the node.  
+It works by essentially having a hashmap with a reference to a socket.  
+When a packet comes in the node gets forwarded to the right socket.
+
+## Handling network state
+The master node ensures there are no duplicate identifiers and therefore nodes.  
+Also, it will make sure no invalid updates can be sent.  
+Most packets go through the master node before getting to the source.  
+Most because the subnet node can have private nodes and handle those themselves.
+
+# The Relay node (`relay`)
+The relay node is simple.  
+In config you define where to forward the packets to, and they get delivered to there.  
+
+# The Subnet node (`subnet`)
+This is maybe another advanced node.  
+It's a slave node that also acts as a master node.  
+You can define private nodes in config, and they will be managed by the subnet node.  
+For big domo networks this can be very useful to ensure privacy and keep control.
+
+## Subnet properties
+The `domo_node` implementation ensures a couple properties.
+
+### Lights (`all_lights` = `Switch`)
+With this property you can turn off all the lights in the subnet.  
+This property will be absent is there are no lights present in the subnet.
+
+> TODO: this feature requires distinction between switches and lights.  
+> Either with extra identification information in `0x01`
+
+### Enabled (`enabled` = `Switch`)
+Enable or disable the subnet.  
+Functionality like: Master emulation, forwarding, private nodes will be paused.  
+
+### Forward (`forward` = `Swtich`)
+This will disable the forwarding of the subnet's node.  
+Essentially make the subnet all private.