Allow null expected values for just ignoring the value (todo: maybe allow byte expected values).
Allow null expected values for just ignoring the value (todo: maybe allow byte expected values).

jmptrader/manos,mdavid/manos-spdy,jacksonh/manos,jacksonh/manos,jmptrader/manos,jacksonh/manos,jmptrader/manos,mdavid/manos-spdy,jacksonh/manos,jmptrader/manos,jacksonh/manos,mdavid/manos-spdy,jacksonh/manos,jacksonh/manos,jacksonh/manos,jmptrader/manos,jmptrader/manos,mdavid/manos-spdy,mdavid/manos-spdy,mdavid/manos-spdy,jmptrader/manos,mdavid/manos-spdy,jmptrader/manos