dosemu2-2.0pre5

• SDL video backend is now default, which means a GPU-accelerated rendering
• lredir command was deprecated, use lredir2 with the new syntax
• unix.com syntax was slightly changed
• new tool sound.com is added to change sound and MIDI parameters at run-time
• LPT2 is now pre-configured to print to PDF files
• Added preliminary support for old MS-DOSes (>=3.3) and some DR-DOSes
• many improvements to dosdebug
• use logarithmic volume scale for sound
• Preliminary KVM support - a very fast execution on 64bit machines.
  Should be manually enabled in config for now.
• Many regressions fixed
• Added valgrind support, which allowed to find many obscure bugs
• Work-arounds to support the newer fluidsynth for MIDI
• More versions of libao are supported for sound (each having its own bugs).
  This is good when SDL2 is unavailable.
• munt support for mt32 (you need to download Roland ROMs yourself)
• built-in backtracer is added for a better crash logs.
  Used if gdb is not installed.
• clang is now supported to compile dosemu2