Log Message:
Update to 12.17.7:

  o Christian Weisgerber sent patches to man page fixes
    and patches for sunaudio driver on openbsd.
  o Default volume for soxmix wrongly set to 0 instead
    of 1/#_input_files (float rounding error).
  o Update to ALSA driver to do a better job of detecting
    unsupported sample rate/size/encoding and change to
    a supported one.
  o Fix bug in alsa writing were last last partial buffer
    wasn't being flushed.
  o Guentcho Skordev pointed out ogg vorbis files were using
    the same value for serial numbers each time.
  o Changed sox to only read the exact size of a WAV data chunk
    if cooledit IFF LIST chunk is found at the end of the file.
    Normally, this isn't done to allow reading > 2gig WAV files.
  o Modified configure to detect cygwin compiler after detecting
    gcc compiler (fixes some default CFLAGS options).
  o Added explicit rule for compile *.o from *.c so that
    CPPFLAGS is always referenced.  Not all platform's default
    rule includes CPPFLAGS (FreeBSD).
  o Under linux, add include path to /lib/modules/* so that ALSA
    include files can be auto detected.
  o Ian Turner added an effect to remove noise from an audio
    file by first profiling silent periods of the audio
    to determine what the noise is (like background hiss on
    cassette tapes).