
v.2.21.11 adds support for Pierburg CWA400 LIN water pump.

	As a reminder, Bosch WDA:
		* Event-in OEM1 is INT (intermittent operation request)
		* Event-in OEM2 is S1 (speed 1 operation request)
		* Event-in OEM3 is S2 (speed 2 operation request)
		* Event-in OEM4 is SST (single stroke operation request)
		* Event-in OEM5 is IM (intermittent interval; set to 1/5/9/13)

	Pierburg CWA400:
		* Event-in OEM8 is SIG_CWA_CTRL_SETSPEED (set speed 0-255)
		* Event-in OEM7 is SIG_CWA_CTRL_OVSH (post-run request 0-7)
		* Event-out OEM8 returns SIG_CWA_ST_CURRSPEED (current actual speed 0-255)
		* Event-out OEM7 returns SIG_CWA_ST_TEMP (temperature in degC)
		* Event-out OEM6 returns SIG_CWA_ST_CURRENT (current in A)
		* These values are zero if no response is received from the pump
