Added SDL_HINT_HIDAPI_IGNORE_DEVICES to specify devices that should be ignored in SDL_hid_enumerate()

include/SDL_hints.h

@@ -539,6 +539,14 @@ extern "C" {
  */
 #define SDL_HINT_GRAB_KEYBOARD              "SDL_GRAB_KEYBOARD"
 
+/**
+ *  \brief  A variable containing a list of devices to ignore in SDL_hid_enumerate()
+ *
+ *  For example, to ignore the Shanwan DS3 controller and any Valve controller, you might
+ *  have the string "0x2563/0x0523,0x28de/0x0000"
+ */
+#define SDL_HINT_HIDAPI_IGNORE_DEVICES "SDL_HIDAPI_IGNORE_DEVICES"
+
 /**
  *  \brief  A variable controlling whether the idle timer is disabled on iOS.
  *