Protocol for data exchange between daemon and client
----------------------------------------------------

Client commands:
	
	- list [node]
	  	Asks client to list all items available for query for
		this host. If no host is given, default to host that runs
		the munin-node
	
	- nodes
		List hosts

	- config <query-item>
		Asks the client for configuration items.

	- fetch <query-item>
	  	Fetches values.

	- version
		Print versionstring

List simply lists items available for gathering. E.g. load, cpu, memory,
df, et alia.

Config gives the basic configuration for an item. See the file 
"README.config" for a full description.

Example outputs:

	> config load
	< graph_args --title "Load average"
	< load.label Load
	< .
	> config memory
	< graph_args --title "Memory usage" --base 1024
	< used.label Used
	< used.draw AREA
	< shared.label Shared
	< shared.draw STACK
	< buffers.label Buffers
	< buffers.draw STACK
	< cache.label Cache
	< cache.draw STACK
	< free.label Free
	< free.draw STACK
	< swap.label Swap
	< swap.draw STACK

Fetch fetches the actual values. Returned data fields:

	- <field>.value
	  	Numeric value, or 'U'. Required.

Example outputs:

	> fetch load
	< load.value 0.42
	< .
	> fetch memory
	< used.value 98422784
	< shared.value 1058086912
	< buffers.value 2912256
	< cache.value 8593408
	< free.value 235753472
	< swap.value 85053440