Various small test/sample programs for the Linux DVB API Version 2/3

The default devices used by the test programs are generally
/dev/dvb/adapter0/*0, and can be overridden using environment
variables:

  FRONTEND=/dev/dvb/adapter0/frontend0
  DEMUX=/dev/dvb/adapter0/demux0
  DVR=/dev/dvb/adapter0/dvr0
  AUDIO=/dev/dvb/adapter0/audio0
  VIDEO=/dev/dvb/adapter0/video0
  NET=/dev/dvb/adapter0/net0


diseqc		: Send various diseqc sequences on a SAT frontend.
		  Best used with a diseqc test box with some LEDs                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  