Log Message:
libopenmpt: update to 0.7.1.

### libopenmpt 0.7.1 (2023-05-07)

 *  [**Bug**] MSVC projects failed to build from the packaged source zip.

 *  IT: Improved fingerprinting of early ModPlug Tracker versions.
 *  XMF: Modules from Astroidea demos can now be read as well.

### libopenmpt 0.7.0 (2023-04-30)

 *  [**New**] `667` files from Composer 667 are now supported.
 *  [**New**] `GTK` and `GT2` files from Gramouf Tracker are now supported.
 *  [**New**] Can now read a variant of the DSMI AMF format called DMF, as found
    in various DOS games distributed by Webfoot (Tronic, H2O, PowBall, etc.).
 *  [**New**] `DSM` files from Dynamic Studio are now supported.
 *  [**New**] `XMF` files from the DOS game Imperium Galactica are now supported.
 *  [**New**] Can now read the hacked MOD format (`DMF`) from the game
    "Apocalypse Abyss".
 *  [**New**] libopenmpt: New APIs for getting the current tempo as a floating
    point value: `openmpt::module::get_current_tempo2()` (C++), and
    `openmpt_module_get_current_tempo2()` (C).
 *  [**New**] C API: New stream callbacks for various platform extensions to the
    C stdio interface: `openmpt_stream_get_file_posix_lfs64_callbacks()` in
    `libopenmpt/libopenmpt_stream_callbacks_file_posix_lfs64.h` for explicit
    `off64_t` on Posix systems, `openmpt_stream_get_file_posix_callbacks()` in
    `libopenmpt/libopenmpt_stream_callbacks_file_posix.h` for `off_t` on Posix
    systems, `openmpt_stream_get_file_msvcrt_callbacks()` in
    `libopenmpt/libopenmpt_stream_callbacks_file_msvcrt.h` for 64bit file
    support on Windows systems with the Microsoft C runtime, and
    `openmpt_stream_get_file_mingw_callbacks()` in
    `libopenmpt/libopenmpt_stream_callbacks_file_mingw.h` for 64bit file support
    when targetting MinGW. The old `openmpt_stream_get_file_callbacks()` has
    been deprecated in favour of a stricly standard conforming
    `openmpt_stream_get_file_callbacks2()` in the same
    `libopenmpt/libopenmpt_stream_callbacks_file.h` header.
    `libopenmpt/libopenmpt.h` defines
    `LIBOPENMPT_STREAM_CALLBACKS_FILE_POSIX_LFS64`,
    `LIBOPENMPT_STREAM_CALLBACKS_FILE_POSIX`,
    `LIBOPENMPT_STREAM_CALLBACKS_FILE_MSVCRT`, and
    `LIBOPENMPT_STREAM_CALLBACKS_FILE_MINGW` respectively in order to allow for
    checking header availability.
 *  [**New**] C API: New stream callbacks for memory buffers.
    `openmpt_stream_get_buffer_callbacks()` and `openmpt_stream_buffer_init()`
    are deprecated. Use `openmpt_stream_get_buffer_callbacks2()` and
    `openmpt_stream_buffer_init2()` instead. The new variants do not support
    loading only a file prefix and checking for overflow any more. This was only
    useful when using the old `openmpt_could_open_probability2()` style
    interface from the libopenmpt 0.2 API, which has been superseded by
    `openmpt_probe_file_header()`,
    `openmpt_probe_file_header_without_filesize()`, and
    `openmpt_probe_file_header_from_stream()` in libopenmpt 0.3.0.
 *  [**New**] libopenmpt_ext: New interface `interactive3` adding
    `openmpt::ext::interactive3::set_current_tempo2()` (C++) and
    `openmpt_module_ext_interface_interactive3.set_current_tempo2()` (C) which
    allow setting non-integer tempo values.
 *  [**New**] New `Makefile` option `CONFIG=mingw-w64` which consolidates all
    MinGW-w64 build configurations with the following options:
    `MINGW_FLAVOUR=[|-posix|-win32]`, `WINDOWS_ARCH=[x86|amd64]`,
    `WINDOWS_FAMILY=[|desktop-app|app|phone-app|pc-app]`, and
    \ 
`WINDOWS_VERSION=[win95|win98|winme|winnt4|win2000|winxp|winxp64|winvista|win7|w \ 
in8|win8.1|win10|win11]`.
 *  [**New**] New `Makefile` option `CONFIG=mingw` which consolidates all MinGW
    build configurations with the following options:
    `MINGW_FLAVOUR=[|-posix|-win32]`, and
    `WINDOWS_VERSION=[win95|win98|winme|winnt4|win2000|winxp]`.
 *  [**New**] Building with MSYS2 is now fully supported for Makefile and
    Autotools build systems.
 *  [**New**] `Makefile` `CONFIG=djgpp` now supports `CPU=` option to build
    optimized for a particular CPU. See `build/make/config-djgpp.mk` for all
    available options. `FLAVOURED_DIR=1` places the CPU-specific optimized
    builds in separate folders below `bin/`.
 *  [**New**] Building with a MinGW32 CRTDLL toolchain is now supported via
    `Makefile` option `CONFIG=mingw32crt`.
 *  [**New**] `Makefile` now uses `PKG_CONFIG` as path to `pkg-config`.
 *  [**New**] The C++ API is now also enabled for Emscripten builds by default.
 *  [**New**] Support for GCC 7 has been restored.
 *  [**New**] Support for Clang 6 has been restored.
 *  [**New**] Support for Android NDK 18 has been restored.
 *  [**New**] openmpt123: `--banner [0|1|2]` allows changing the openmpt123
    banner style to hidden, shown, or verbose, respectively.
 *  [**New**] openmpt123: `--assume-terminal` allows skipping the openmpt123
    terminal check, and thus allows running the UI with non-terminal stdin,
    which can be useful for some very basic remote control functionality.

 *  [**Change**] xmp-openmpt: The Amiga resampler emulation is now enabled by
    default.
 *  [**Change**] in_openmpt: The Amiga resampler emulation is now enabled by
    default.
 *  [**Change**] The official Windows builds (x86, amd64, arm, arm64) now
    require Windows 10 21H2 (or later). The official legacy Windows builds
    (x86-legacy, amd64-legacy) are unchanged and still require Windows 7 (or
    later).
 *  [**Change**] `"date"` metadata will now exlude the UTC time zone \ 
signifier
    `Z` if the precise time zone is unknown.
 *  [**Change**] ctl `seek.sync_samples` now defaults to 1.
 *  [**Change**] `Makefile` `CONFIG=generic` is gone. Please use
    `CONFIG=standard` instead.
 *  [**Change**] `Makefile` `CONFIG=macosx` and `CONFIG=haiku` have been
    removed. The OS is auto-detected.
 *  [**Change**] `Makefile` options `CONFIG=mingw64-win32`,
    `CONFIG=mingw64-win64`, `CONFIG=mingw64-winrt-x86`,
    `CONFIG=mingw64-winrt-amd64`, and `CONFIG=mingw-win9x` have been replaced by
    `CONFIG=mingw-w64`, and `CONFIG=mingw`.
 *  [**Change**] Autotools now default to C++20 and only fall back to C++17 when
    C++20 is not supported.
 *  [**Change**] `Makefile` now defaults to C++20 and only falls back to C++17
    when C++20 is not supported by the compiler.
 *  [**Change**] `Makefile` now defaults to C17 and only falls back to C11 when
    C17 is not supported by the compiler.
 *  [**Change**] `Makefile` `CONFIG=djgpp` option `USE_ALLEGRO42` now
    defaults to `1` and implies building a liballegro42 locally. This requires
    executing `build/download_externals.sh` before building to download the
    liballegro42 sources.
 *  [**Change**] in_openmpt: The Winamp input plugin in_openmpt is now
    deprecated for use with the latest Winamp or WACUP releases. Please use the
    native implementations available in Winamp >=5.9.0 or WACUP instead. This
    does not mean that in_openmpt/in_mod will not receive further development,
    it just means that the responsibility now lies with the player implementors
    themselves. We will still maintain the status quo of our in_openmpt input
    plugin for users of earlier Winamp version, or users on older systems, or
    users of compatible players.
 *  [**Change**] The POSIX fd file callbacks implementation now handles `EINTR`
    and retries the `read()` call.

 *  [**Regression**] Full support for Visual Studio 2017 has been removed. We
    still support targeting Windows XP with Visual Studio 2017.
 *  [**Regression**] Support for mingw-std-threads has been removed. If you
    require a thread-safe libopenmpt, please build with POSIX threading model
    and/or complain to MinGW/GCC about not properly supporting C++11 features in
    2023.
 *  [**Regression**] Support for Emscripten versions older than 3.1.1 has been
    removed.
 *  [**Regression**] C API: `openmpt_stream_get_file_callbacks()` used to
    provide 64bit file access on some platforms where long is 32bit. This never
    worked reliably for all platforms though. The behaviour is now changed to
    always stick to what standard C supports with `fseek` and `ftell`, where the
    offset type is long. `openmpt_stream_get_file_callbacks()` is deprecated now
    due to behavioral change. Please migrate to
    `openmpt_stream_get_file_callbacks2()`.
 *  [**Regression**] Using the system-provided liballegro42 is no longer
    supported. The option `BUNDLED_ALLEGRO42=1` does not exist any more.

 *  Reduced aliasing when downsampling with the Sinc + Low-Pass resampler.
 *  The sample position is now rounded instead of truncated when resampling
    without interpolation.
 *  Seeking with sample sync now supports portamento up / down commands as well
    as IMF/ PTM note slides. Tone portamento is now synchronized correctly when
    seeking in DBM, 669 and MED with fast slides (first tick of portamento was
    previously not executed).
 *  The filter cutoff frequency is no longer rounded to integer frequency values.
 *  MED: Tempos higher than 255 BPM can now be imported in pattern data.
 *  MED: MMD1 files with more than 16 channels are now supported.
 *  ULT: Import 8-bit volume commands with full precision.
 *  IT: Initial "last note memory" of every channel is C-0, so a lone \ 
instrument
    number without note triggers that note.
 *  S3M: Better approximation of old "stereo control" SAx command used in
    Purple Motion's PANIC.S3M.
 *  S3M: In ScreamTracker 3.03 and later, OPL notes with tone portamento next to
    them are delayed until the next row and then the new pitch is used instantly.
 *  MO3: Envelope sustain was not imported correctly if the source file was an
    XM.
 *  MOD: Lone instrument number with retrigger effect swap sample immediately.
 *  Recalling a sample's default volume using an instrument number (as opposed
    to regular volume commands) previously ramped the volume change smoothly
    over a whole tick. Now the user-configured ramp settings are used instead
    (as it would happen when using a volume command to achieve the same effect).

 *  zlib: v1.2.12 (2022-03-27).
 *  mpg123: v1.31.3 (2023-03-19).
 *  ogg: v1.3.5 (2021-06-04).
 *  vorbis: v1.3.7 (2020-07-04).
 *  miniz: v2.2.0 (2021-06-27).
 *  minimp3: commit 50d2aaf360a53653b718fead8e258d654c3a7e41 (2021-11-27).
 *  stb_vorbis: v1.22 commit 5a0bb8b1c1b1ca3f4e2485f4114c1c8ea021b781
    (2021-07-12).
 *  FLAC: v1.4.2 (2022-10-22).
 *  PortAudio: v19.7.0 (2021-04-06).