Log Message:
Update to 2.0.4.

Many pkgsrc patches merged upstream.

2.0.4:
---------------------------------------------------------------------------

General:
* Added support for web applications using Emscripten, see \ 
docs/README-emscripten.md for more information
* Added support for web applications using Native Client (NaCl), see \ 
docs/README-nacl.md for more information
* Added an API to queue audio instead of using the audio callback:
    SDL_QueueAudio(), SDL_GetQueuedAudioSize(), SDL_ClearQueuedAudio()
* Added events for audio device hot plug support:
    SDL_AUDIODEVICEADDED, SDL_AUDIODEVICEREMOVED
* Added SDL_PointInRect()
* Added SDL_HasAVX2() to detect CPUs with AVX2 support
* Added SDL_SetWindowHitTest() to let apps treat parts of their SDL window like \ 
traditional window decorations (drag areas, resize areas)
* Added SDL_GetGrabbedWindow() to get the window that currently has input grab, \ 
if any
* Added SDL_RenderIsClipEnabled() to tell whether clipping is currently enabled \ 
in a renderer
* Added SDL_CaptureMouse() to capture the mouse to get events while the mouse is \ 
not in your window
* Added SDL_WarpMouseGlobal() to warp the mouse cursor in global screen space
* Added SDL_GetGlobalMouseState() to get the current mouse state outside of an \ 
SDL window
* Added a direction field to mouse wheel events to tell whether they are flipped \ 
(natural) or not
* Added GL_CONTEXT_RELEASE_BEHAVIOR GL attribute (maps to \ 
[WGL|GLX]_ARB_context_flush_control extension)
* Added EGL_KHR_create_context support to allow OpenGL ES version selection on \ 
some platforms
* Added NV12 and NV21 YUV texture support for OpenGL and OpenGL ES 2.0 renderers
* Added a Vivante video driver that is used on various SoC platforms
* Added an event SDL_RENDER_DEVICE_RESET that is sent from the D3D renderers \ 
when the D3D device is lost, and from Android's event loop when the GLES context \ 
had to be recreated
* Added a hint SDL_HINT_NO_SIGNAL_HANDLERS to disable SDL's built in signal handling
* Added a hint SDL_HINT_THREAD_STACK_SIZE to set the stack size of SDL's threads
* Added SDL_sqrtf(), SDL_tan(), and SDL_tanf() to the stdlib routines
* Improved support for WAV and BMP files with unusual chunks in them
* Renamed SDL_assert_data to SDL_AssertData and SDL_assert_state to SDL_AssertState
* Added a hint SDL_HINT_WINDOW_FRAME_USABLE_WHILE_CURSOR_HIDDEN to prevent \ 
window interaction while cursor is hidden
* Added SDL_GetDisplayDPI() to get the DPI information for a display
* Added SDL_JoystickCurrentPowerLevel() to get the battery level of a joystick
* Added SDL_JoystickFromInstanceID(), as a helper function, to get the \ 
SDL_Joystick* that an event is referring to.
* Added SDL_GameControllerFromInstanceID(), as a helper function, to get the \ 
SDL_GameController* that an event is referring to.

Windows:
* Added support for Windows Phone 8.1 and Windows 10/UWP (Universal Windows Platform)
* Timer resolution is now 1 ms by default, adjustable with the \ 
SDL_HINT_TIMER_RESOLUTION hint
* SDLmain no longer depends on the C runtime, so you can use the same .lib in \ 
both Debug and Release builds
* Added SDL_SetWindowsMessageHook() to set a function to be called for every \ 
windows message before TranslateMessage()
* Added a hint SDL_HINT_WINDOWS_ENABLE_MESSAGELOOP to control whether \ 
SDL_PumpEvents() processes the Windows message loop
* You can distinguish between real mouse and touch events by looking for \ 
SDL_TOUCH_MOUSEID in the mouse event "which" field
* SDL_SysWMinfo now contains the window HDC
* Added support for Unicode command line options
* Prevent beeping when Alt-key combos are pressed
* SDL_SetTextInputRect() re-positions the OS-rendered IME
* Added a hint SDL_HINT_WINDOWS_NO_CLOSE_ON_ALT_F4 to prevent generating \ 
SDL_WINDOWEVENT_CLOSE events when Alt-F4 is pressed
* Added a hint SDL_HINT_XINPUT_USE_OLD_JOYSTICK_MAPPING to use the old axis and \ 
button mapping for XInput devices (deprecated)

Mac OS X:
* Implemented drag-and-drop support
* Improved joystick hot-plug detection
* The SDL_WINDOWEVENT_EXPOSED window event is triggered in the appropriate situations
* Fixed relative mouse mode when the application loses/regains focus
* Fixed bugs related to transitioning to and from Spaces-aware \ 
fullscreen-desktop mode
* Fixed the refresh rate of display modes
* SDL_SysWMInfo is now ARC-compatible
* Added a hint SDL_HINT_MAC_BACKGROUND_APP to prevent forcing the application to \ 
become a foreground process

Linux:
* Enabled building with Mir and Wayland support by default.
* Added IBus IME support
* Added a hint SDL_HINT_IME_INTERNAL_EDITING to control whether IBus should \ 
handle text editing internally instead of sending SDL_TEXTEDITING events
* Added a hint SDL_HINT_VIDEO_X11_NET_WM_PING to allow disabling _NET_WM_PING \ 
protocol handling in SDL_CreateWindow()
* Added support for multiple audio devices when using Pulseaudio
* Fixed duplicate mouse events when using relative mouse motion

iOS:
* Added support for iOS 8
* The SDL_WINDOW_ALLOW_HIGHDPI window flag now enables high-dpi support, and \ 
SDL_GL_GetDrawableSize() or SDL_GetRendererOutputSize() gets the window \ 
resolution in pixels
* SDL_GetWindowSize() and display mode sizes are in the "DPI-independent \ 
points" / "screen coordinates" coordinate space rather than \ 
pixels (matches OS X behavior)
* Added native resolution support for the iPhone 6 Plus
* Added support for MFi game controllers
* Added support for the hint SDL_HINT_ACCELEROMETER_AS_JOYSTICK
* Added sRGB OpenGL ES context support on iOS 7+
* Added support for SDL_DisableScreenSaver(), SDL_EnableScreenSaver() and the \ 
hint SDL_HINT_VIDEO_ALLOW_SCREENSAVER
* SDL_SysWMinfo now contains the OpenGL ES framebuffer and color renderbuffer \ 
objects used by the window's active GLES view
* Fixed various rotation and orientation issues
* Fixed memory leaks

Android:
* Added a hint SDL_HINT_ANDROID_SEPARATE_MOUSE_AND_TOUCH to prevent mouse events \ 
from being registered as touch events
* Added hints SDL_HINT_ANDROID_APK_EXPANSION_MAIN_FILE_VERSION and \ 
SDL_HINT_ANDROID_APK_EXPANSION_PATCH_FILE_VERSION
* Added support for SDL_DisableScreenSaver(), SDL_EnableScreenSaver() and the \ 
hint SDL_HINT_VIDEO_ALLOW_SCREENSAVER
* Added support for SDL_ShowMessageBox() and SDL_ShowSimpleMessageBox()

Raspberry Pi:
* Added support for the Raspberry Pi 2