- hardcode the processing chain (it used to be setup dynamically)
- merge simpler processing code from sndiod
- remove -M option, aucat is not a midi tool, sorry.
- remove -t flag (redundant with -q flag)
- remove -w flag (makes sense for server mode only)
- remove -C flag (necessary for full-duplex streams only)
- remove -x flag (xruns already handled by sndiod)
- make "-j off" the default (sndiod already does the job)
- don't limit the number of played/recorded files.