Restore old acceleration behavior until something is actually agreed on

src/defaultsettings.cpp

@@ -180,9 +180,9 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("remote_media", "");
 
 	// physics stuff
-	settings->setDefault("movement_acceleration_default", "2");
-	settings->setDefault("movement_acceleration_air", "0.5");
-	settings->setDefault("movement_acceleration_fast", "8");
+	settings->setDefault("movement_acceleration_default", "4");
+	settings->setDefault("movement_acceleration_air", "4");
+	settings->setDefault("movement_acceleration_fast", "4");
 	settings->setDefault("movement_speed_walk", "4");
 	settings->setDefault("movement_speed_crouch", "1.35");
 	settings->setDefault("movement_speed_fast", "20");