Release 4.0.0beta1 (r4_0_0beta1)

• Optimize Images (#3539).
  (contributed by @ann0see)

• Added uncompressed audio transmission - dedicated to the memory of Hans Petter Selasky (1982 - 2023) (#3653).
  (contributed by @dingodoppelt)

• Internals: fix deprecation warnings in threadpool.h for C++17 onwards (#3681).
  (contributed by @softins)

• Make server version string searchable (#3693).
  (contributed by @dingodoppelt)

• Introduce Directory Server in Asia. This replaces Any Genre 3. Asian/Australian users should from now on use Any Genre Asia (#3697).
  (contributed by @ann0see)

• Move internal domains from jamulus.io to jamulus.app as .io domains have an unclear future (#3701).
  (contributed by @ann0see)

• Updated copyright to incorporate AGPL3.0+ (#3712).
  (contributed by @pljones)

• Bugfix: Provide a working location for famfamfam flags (#3722).
  (contributed by @pljones)

• Request and receive server features by connection-less message (#3727).
  (contributed by @pljones)

• Bugfix: Fix memory leak for audio alerts (#3728).
  (contributed by @ann0see)

• Refactor server chat handling by extracting methods (#3741).
  (contributed by @dingodoppelt)

• Add uncompressed audio transmission - dedicated to the memory of Hans Petter Selasky (1982 - 2023)
  (contributed by @dingodoppelt)

• Client: Ensure INI file settings are loaded before doing -c/--connect startup (#3738).
  (contributed by @seanogdelaney)

• Client/Server: Enable IPv6 by default if supported by host. Provide option to disable manually (#3720).
  (contributed by @softins)

• Server: Report OS as Unix if not Windows, Mac, iOS, Android or Linux (#3699).
  (contributed by @softins)

• Server: Optimize mixing (#3706).
  (contributed by @ann0see)

• Server: Removed HTML status file support and -m/--htmlstatus option (#3721).
  (contributed by @softins)

• Internal: Removed unused array to silence compiler warning (#3717).
  (contributed by @softins)