Format and comment fw, mc, vtol, and ugv vehicle apps and default startup scripts.

ROMFS/px4fmu_common/init.d/rc.fw_defaults

@@ -1,11 +1,16 @@
 #!nsh
+#
+# Fixed wing default parameters
+#
+# NOTE: Script variables are declared/initialized/unset in the rcS script.
+#
 
 set VEHICLE_TYPE fw
 
 if [ $AUTOCNF == yes ]
 then
 	#
-	# Default parameters for FW
+	# Default parameters for fixed wing uavs.
 	#
 	param set COM_POS_FS_DELAY 5
 	param set COM_POS_FS_EPH 25
@@ -23,8 +28,8 @@ then
 	param set RTL_DESCEND_ALT 100
 	param set RTL_LAND_DELAY -1
 
-	# FW uses L1 distance for acceptance radius
-	#  set a smaller NAV_ACC_RAD for vertical acceptance distance
+	# FW uses L1 distance for acceptance radius,
+	#  set a smaller NAV_ACC_RAD for vertical acceptance distance.
 	param set NAV_ACC_RAD 10
 
 	param set MIS_LTRMIN_ALT 25
@@ -32,11 +37,11 @@ then
 
 	param set PWM_RATE 50
 
-	# FW takeoff acceleration can easily exceed ublox GPS 2G default
+	# FW takeoff acceleration can easily exceed ublox GPS 2G default.
 	param set GPS_UBX_DYNMODEL 8
 fi
 
-# This is the gimbal pass mixer
+# This is the gimbal pass mixer.
 set MIXER_AUX pass
 set PWM_AUX_RATE 50
 set PWM_AUX_OUT 1234