DOSBox-Staging Repository Update (September 19, 2025)

DOSBox-Staging Git (2025/09/19) has been compiled, aimed at modernizing the DOSBox project with current development practices. Key changes in the update include reorganizing files into appropriate directories (e.g., moving programs.cpp to src/dos), enhancing code structure by making certain headers private, and refining the organization of GUI and hardware-related functions. The update addresses copyright headers, eliminates unused files, and integrates several components for better performance on modern systems. Contributions also focus on upstream patching and feature enhancements. For downloading, several file-sharing options are available.

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DOSBox-Staging Git (2025/09/19) has been compiled. This repository aims to update the DOSBox project by integrating modern development practices and tools, resolving issues, adding features that enhance compatibility with contemporary systems, and contributing patches upstream.

DOSBox-Staging Git Changelog:
* Relocated `programs.cpp` to `src/dos`
* Relocated `string_utils.cpp` to `src/utils`
* Relocated `video.h` to `src/misc`
* Updated copyright headers
* Moved `DOSBOX_PollAndHandleEvents()` definition to `gui/common.h`
* Transferred private definitions to `gui/private/common.h`
* Created `render_templates.h`
* Made `render_simple.h` private
* Eliminated unused `render_loops.h`
* Merged `gui_msgs.h` into `sdlmain.cpp`
* Made `shader_manager.h` private
* Made `sdlmain.h` private
* Removed `.pvs-suppress`
* Moved `PixelFormat` helpers to `vga.cpp`
* Transferred `MouseHint` to `mouse.h`
* Prefixed titlebar notification functions with `TITLEBAR_`
* Relocated `reelmagic` to `src/hardware/video`
* Moved `ethernet_*.cpp|h` to `src/network`
* Removed `midi_` prefix from MIDI device implementation files
* Transferred MAME audio device emulations to `src/hardware/audio/`
* Moved `ipx*.cpp|h` & `ne2000.cpp|h` to `src/hardware/network`
* Shifted GUI-related functions from `video.h` to `gui/common.h`
* Introduced `src/gui/common.h`
* Made `gfx_stop()` private to `sdlmain.cpp`
* Made `gfx_request_exit()` private to `sdlmain.cpp`
* Added TODOs to `video.h`
* Removed unused function declarations
* Transferred `MAPPER_UpdateJoysticks()` declaration to `mapper.h`
* Shifted `video.h` to `src/hardware/video`
* Moved `mpu401.cpp|h` to `src/hardware/audio`
* Moved `joystick.cpp|h` to `src/hardware/input`
* Permanently removed `pacer.cpp|h`