ofdmframesync: vastly improving detection probability
ofdmframesync: vastly improving detection probability

  * adjusting timing based on S0 metrics
  * lowering thresholds
  * block-commenting 'false alarm' detection

cjcliffe/liquid-dsp,wangning223/liquid-dsp,cjcliffe/liquid-dsp,manuts/liquid-dsp,andrepuschmann/liquid-dsp,jgaeddert/liquid-dsp,biotrump/liquid-dsp,JayKickliter/liquid-dsp,wangning223/liquid-dsp,biotrump/liquid-dsp,cjcliffe/liquid-dsp,cjcliffe/liquid-dsp,jgaeddert/liquid-dsp,JayKickliter/liquid-dsp,manuts/liquid-dsp,jgaeddert/liquid-dsp,andrepuschmann/liquid-dsp,andrepuschmann/liquid-dsp,JayKickliter/liquid-dsp,JayKickliter/liquid-dsp,jgaeddert/liquid-dsp,manuts/liquid-dsp,biotrump/liquid-dsp,wangning223/liquid-dsp,manuts/liquid-dsp,manuts/liquid-dsp,andrepuschmann/liquid-dsp,wangning223/liquid-dsp,JayKickliter/liquid-dsp,biotrump/liquid-dsp,wangning223/liquid-dsp,andrepuschmann/liquid-dsp,jgaeddert/liquid-dsp,biotrump/liquid-dsp,cjcliffe/liquid-dsp