Adding notes regarding rcOptions.

src/runtime_config.c

@@ -4,6 +4,14 @@
 #include "runtime_config.h"
 
 flags_t f;
+
+// each entry in the array is a bitmask, 3 bits per aux channel (only aux 1 to 4), aux1 is first, each bit corresponds to an rc channel reading
+// bit 1 - stick LOW
+// bit 2 - stick MIDDLE
+// bit 3 - stick HIGH
+// an option is enabled when ANY channel has an appropriate reading corresponding to the bit.
+// an option is disabled when NO channel has an appropriate reading corresponding to the bit.
+// example: 110000000001 - option is only enabled when AUX1 is LOW or AUX4 is MEDIUM or HIGH.
 uint8_t rcOptions[CHECKBOX_ITEM_COUNT];
 
 static uint32_t enabledSensors = 0;