Log Message:
musicpd: Various improvements in SolarisOutputPlugin

- Use AUDIO_INITINFO rather than AUDIO_GETINFO for initialization
  This is recommended by Solaris and NetBSD documentation.
- Don't open the device with O_NONBLOCK then remove the flag.
  AFAIK this is a workaround for old implementations that wouldn't
  allow the device to be opened in blocking mode if it was already
  in use. Either way, it hasn't been necessary for a long time.
- Support S8 and S32 audio formats.