commander: make auto disarm timeout float

such that fractions of a second are configurable

ROMFS/px4fmu_common/init.d-posix/rcS

@@ -108,7 +108,7 @@ then
 	param set SENS_DPRES_OFF 0.001
 	param set CBRK_AIRSPD_CHK 0
 
-	param set COM_DISARM_LAND 3
+	param set COM_DISARM_LAND 0.1
 	param set COM_OBL_ACT 2
 	param set COM_OBL_RC_ACT 0
 	param set COM_OF_LOSS_T 5

ROMFS/px4fmu_common/init.d/1002_standard_vtol.hil

@@ -14,7 +14,7 @@ if [ $AUTOCNF == yes ]
 then
 	param set BAT_N_CELLS 3
 
-	param set COM_DISARM_LAND 5
+	param set COM_DISARM_LAND 5.0
 	param set COM_RC_IN_MODE 1
 
 	param set EKF2_AID_MASK 1

ROMFS/px4fmu_common/init.d/13013_deltaquad

@@ -25,7 +25,7 @@ then
 	param set BAT_N_CELLS 4
 	param set BAT_R_INTERNAL 0.0025
 
-	param set COM_DISARM_LAND 5
+	param set COM_DISARM_LAND 5.0
 
 	param set VT_TYPE 2
 	param set VT_MOT_COUNT 4

ROMFS/px4fmu_common/init.d/4030_3dr_solo

@@ -32,7 +32,7 @@ then
 
 	# takeoff, land and RTL settings
 	param set MIS_TAKEOFF_ALT   4.0
-	param set COM_DISARM_LAND   1
+	param set COM_DISARM_LAND   1.0
 	param set RTL_LAND_DELAY    1
 	param set RTL_DESCEND_ALT   5.0
 	param set RTL_RETURN_ALT    15.0

ROMFS/px4fmu_common/init.d/4070_aerofc

@@ -23,7 +23,7 @@ if [ $AUTOCNF == yes ]
 then
 	# Set all params here, then disable autoconfig
 
-	param set COM_DISARM_LAND 3
+	param set COM_DISARM_LAND 3.0
 
 	param set LNDMC_Z_VEL_MAX 2.0000