AP_Relay: add -1:Disabled to list of param values

Author: rmackay9

.pydevproject

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<?eclipse-pydev version="1.0"?><pydev_project>
+<pydev_property name="org.python.pydev.PYTHON_PROJECT_INTERPRETER">Default</pydev_property>
+<pydev_property name="org.python.pydev.PYTHON_PROJECT_VERSION">python 2.7</pydev_property>
+</pydev_project>

libraries/AP_Relay/AP_Relay.cpp

@@ -32,28 +32,28 @@ const AP_Param::GroupInfo AP_Relay::var_info[] PROGMEM = {
     // @DisplayName: First Relay Pin
     // @Description: Digital pin number for first relay control. This is the pin used for camera control.
     // @User: Standard
-    // @Values: 13:APM2 A9 pin,47:APM1 relay,50:Pixhawk FMU AUX1,51:Pixhawk FMU AUX2,52:Pixhawk FMU AUX3,53:Pixhawk FMU AUX4,54:Pixhawk FMU AUX5,55:Pixhawk FMU AUX6,111:PX4 FMU Relay1,112:PX4 FMU Relay2,113:PX4IO Relay1,114:PX4IO Relay2,115:PX4IO ACC1,116:PX4IO ACC2
+    // @Values: -1:Disabled,13:APM2 A9 pin,47:APM1 relay,50:Pixhawk FMU AUX1,51:Pixhawk FMU AUX2,52:Pixhawk FMU AUX3,53:Pixhawk FMU AUX4,54:Pixhawk FMU AUX5,55:Pixhawk FMU AUX6,111:PX4 FMU Relay1,112:PX4 FMU Relay2,113:PX4IO Relay1,114:PX4IO Relay2,115:PX4IO ACC1,116:PX4IO ACC2
     AP_GROUPINFO("PIN",  0, AP_Relay, _pin[0], RELAY_PIN),
 
     // @Param: PIN2
     // @DisplayName: Second Relay Pin
     // @Description: Digital pin number for 2nd relay control.
     // @User: Standard
-    // @Values: 13:APM2 A9 pin,47:APM1 relay,50:Pixhawk FMU AUX1,51:Pixhawk FMU AUX2,52:Pixhawk FMU AUX3,53:Pixhawk FMU AUX4,54:Pixhawk FMU AUX5,55:Pixhawk FMU AUX6,111:PX4 FMU Relay1,112:PX4 FMU Relay2,113:PX4IO Relay1,114:PX4IO Relay2,115:PX4IO ACC1,116:PX4IO ACC2
+    // @Values: -1:Disabled,13:APM2 A9 pin,47:APM1 relay,50:Pixhawk FMU AUX1,51:Pixhawk FMU AUX2,52:Pixhawk FMU AUX3,53:Pixhawk FMU AUX4,54:Pixhawk FMU AUX5,55:Pixhawk FMU AUX6,111:PX4 FMU Relay1,112:PX4 FMU Relay2,113:PX4IO Relay1,114:PX4IO Relay2,115:PX4IO ACC1,116:PX4IO ACC2
     AP_GROUPINFO("PIN2",  1, AP_Relay, _pin[1], -1),
 
     // @Param: PIN3
     // @DisplayName: Third Relay Pin
     // @Description: Digital pin number for 3rd relay control.
     // @User: Standard
-    // @Values: 13:APM2 A9 pin,47:APM1 relay,50:Pixhawk FMU AUX1,51:Pixhawk FMU AUX2,52:Pixhawk FMU AUX3,53:Pixhawk FMU AUX4,54:Pixhawk FMU AUX5,55:Pixhawk FMU AUX6,111:PX4 FMU Relay1,112:PX4 FMU Relay2,113:PX4IO Relay1,114:PX4IO Relay2,115:PX4IO ACC1,116:PX4IO ACC2
+    // @Values: -1:Disabled,13:APM2 A9 pin,47:APM1 relay,50:Pixhawk FMU AUX1,51:Pixhawk FMU AUX2,52:Pixhawk FMU AUX3,53:Pixhawk FMU AUX4,54:Pixhawk FMU AUX5,55:Pixhawk FMU AUX6,111:PX4 FMU Relay1,112:PX4 FMU Relay2,113:PX4IO Relay1,114:PX4IO Relay2,115:PX4IO ACC1,116:PX4IO ACC2
     AP_GROUPINFO("PIN3",  2, AP_Relay, _pin[2], -1),
 
     // @Param: PIN4
     // @DisplayName: Fourth Relay Pin
     // @Description: Digital pin number for 4th relay control.
     // @User: Standard
-    // @Values: 13:APM2 A9 pin,47:APM1 relay,50:Pixhawk FMU AUX1,51:Pixhawk FMU AUX2,52:Pixhawk FMU AUX3,53:Pixhawk FMU AUX4,54:Pixhawk FMU AUX5,55:Pixhawk FMU AUX6,111:PX4 FMU Relay1,112:PX4 FMU Relay2,113:PX4IO Relay1,114:PX4IO Relay2,115:PX4IO ACC1,116:PX4IO ACC2
+    // @Values: -1:Disabled,13:APM2 A9 pin,47:APM1 relay,50:Pixhawk FMU AUX1,51:Pixhawk FMU AUX2,52:Pixhawk FMU AUX3,53:Pixhawk FMU AUX4,54:Pixhawk FMU AUX5,55:Pixhawk FMU AUX6,111:PX4 FMU Relay1,112:PX4 FMU Relay2,113:PX4IO Relay1,114:PX4IO Relay2,115:PX4IO ACC1,116:PX4IO ACC2
     AP_GROUPINFO("PIN4",  3, AP_Relay, _pin[3], -1),
 
     AP_GROUPEND