replace most SDL_SetHint calls with SDL_SetHintWithPriority

ensures calls actually do something and won't be ignored due to env vars

src/BizHawk.Bizware.Graphics/OpenGL/SDL2OpenGLContext.cs

@@ -29,7 +29,7 @@ static SDL2OpenGLContext()
 				// make sure that Linux uses the x11 video driver
 				// we need this as mono winforms uses x11
 				// and the user could potentially try to force the wayland video driver via env vars
-				SDL_SetHint("SDL_VIDEODRIVER", "x11");
+				SDL_SetHintWithPriority("SDL_VIDEODRIVER", "x11", SDL_HintPriority.SDL_HINT_OVERRIDE);
 				// try to use EGL if it is available
 				// GLX is the old API, and is the more or less "deprecated" at this point, and potentially more buggy with some drivers
 				// we do need to a bit more work, in case EGL is not actually available or potentially doesn't have desktop GL support
@@ -97,10 +97,10 @@ static SDL2OpenGLContext()
 
 			// we will be turning a foreign window into an SDL window
 			// we need this so it knows that it is capable of using OpenGL functions
-			SDL_SetHint(SDL_HINT_VIDEO_FOREIGN_WINDOW_OPENGL, "1");
+			SDL_SetHintWithPriority(SDL_HINT_VIDEO_FOREIGN_WINDOW_OPENGL, "1", SDL_HintPriority.SDL_HINT_OVERRIDE);
 			// don't allow windows events to be pumped
 			// it's not needed and can be dangerous in some rare cases
-			SDL_SetHint(SDL_HINT_WINDOWS_ENABLE_MESSAGELOOP, "0");
+			SDL_SetHintWithPriority(SDL_HINT_WINDOWS_ENABLE_MESSAGELOOP, "0", SDL_HintPriority.SDL_HINT_OVERRIDE);
 		}
 
 #if DEBUG_OPENGL

src/BizHawk.Bizware.Input/SDL2/SDL2InputAdapter.cs

@@ -37,7 +37,7 @@ static SDL2InputAdapter()
 		{
 			SDL_SetEventFilter(_sdlEventFilter, IntPtr.Zero);
 			// this is required as we create hidden (unfocused!) SDL windows in IGL backends
-			SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1");
+			SDL_SetHintWithPriority(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1", SDL_HintPriority.SDL_HINT_OVERRIDE);
 		}
 
 		private static void DoSDLEventLoop()

src/BizHawk.Client.EmuHawk/Program.cs

@@ -191,7 +191,7 @@ private static int SubMain(string[] args)
 			// if this isn't done, SIGINT/SIGTERM get swallowed by SDL
 			if (OSTailoredCode.IsUnixHost)
 			{
-				SDL2.SDL.SDL_SetHint(SDL2.SDL.SDL_HINT_NO_SIGNAL_HANDLERS, "1");
+				SDL2.SDL.SDL_SetHintWithPriority(SDL2.SDL.SDL_HINT_NO_SIGNAL_HANDLERS, "1", SDL2.SDL.SDL_HintPriority.SDL_HINT_OVERRIDE);
 			}
 
 			var glInitCount = 0;