Replace pin by gpio (#631)

* replace _PIN by _GPIO

* add mention about the goal of -all binaries

* [breaking] change json key from "pin" to "gpio" for actuatorONOFF

main/config_HCSR501.h

@@ -37,13 +37,13 @@ extern void HCSR501toMQTT();
 #endif
 
 /*-------------------PIN DEFINITIONS----------------------*/
-#ifndef HCSR501_PIN
+#ifndef HCSR501_GPIO
 #  if defined(ESP8266)
-#    define HCSR501_PIN D5
+#    define HCSR501_GPIO D5
 #  elif defined(ESP32)
-#    define HCSR501_PIN 5
+#    define HCSR501_GPIO 5
 #  else
-#    define HCSR501_PIN 7
+#    define HCSR501_GPIO 7
 #  endif
 #endif