don't skip too much input when parsing post data
don't skip too much input when parsing post data

fix due to @toptensoftware.

this error has been there for quite a while, but it never surfaced
bacuse the old ByteBuffer was less strict on which operations it
allowed.

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