[CTX] [ALL] Filter control

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Filter control

Insert a filter program on the way to/from client or server to convert data transmitted between them.

--	----------	------------------	----------------------------------
	FCL	filterCommand	filter between client and DeleGate
	FTOCL	filterCommand	filter from DeleGate to client
	FFROMCL	filterCommand	filter from client to DeleGate
	FSV	filterCommand	filter between server and DeleGate
	FTOSV	filterCommand	filter from DeleGate to server
	FFROMSV	filterCommand	filter from server to DeleGate
	FMD	filterCommand	filter between MASTER and this DeleGate
	FTOMD	filterCommand	filter from this DeleGate to MASTER
	FFROMMD	filterCommand	filter from MASTER to this DeleGate
	XCOM	filterCommand	execute a command as a server
	XFIL	filterCommand	execute a filter as a server

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