Enable DoF (+ setting) & fix texture cache leak

src/dusk/settings.cpp

@@ -51,6 +51,7 @@ UserSettings g_userSettings = {
         .enableFrameInterpolation = {"game.enableFrameInterpolation", false},
         .internalResolutionScale {"game.internalResolutionScale", 0},
         .shadowResolutionMultiplier {"game.shadowResolutionMultiplier", 1},
+        .enableDepthOfField {"game.enableDepthOfField", true},
 
         // Audio
         .noLowHpSound {"game.noLowHpSound", false},
@@ -143,6 +144,7 @@ void registerSettings() {
     Register(g_userSettings.game.disableWaterRefraction);
     Register(g_userSettings.game.internalResolutionScale);
     Register(g_userSettings.game.shadowResolutionMultiplier);
+    Register(g_userSettings.game.enableDepthOfField);
     Register(g_userSettings.game.enableFastIronBoots);
     Register(g_userSettings.game.canTransformAnywhere);
     Register(g_userSettings.game.freeMagicArmor);