REINBECK — Gladbrook-Reinbeck opened postseason play with a sweep Monday, keeping its season alive and earning another night on its home floor.The Rebels defeated Meskwaki Settlement 25-12, 25-16, 25-12 in the first round of the Class 1A Region 6 volleyball tournament, improving to 18-20 and advancing to host HLV-TC in a regional quarterfinal at 7 p.m. Wednesday, Oct. 21.Gladbrook-Reinbeck held the Warriors to 16 points or fewer in each set, win…