Bed Auto Leveling feature

Check the Readme for instruction how to enable and configure the feature

Marlin/Servo.cpp

@@ -262,6 +262,9 @@ uint8_t Servo::attach(int pin)
 uint8_t Servo::attach(int pin, int min, int max)
 {
   if(this->servoIndex < MAX_SERVOS ) {
+#if defined (ENABLE_AUTO_BED_LEVELING) && (PROBE_SERVO_DEACTIVATION_DELAY > 0)
+    if (pin > 0) this->pin = pin; else pin = this->pin;
+#endif
     pinMode( pin, OUTPUT) ;                                   // set servo pin to output
     servos[this->servoIndex].Pin.nbr = pin;
     // todo min/max check: abs(min - MIN_PULSE_WIDTH) /4 < 128