Fix off-by-one access in header_rewrite config parser
Fix off-by-one access in header_rewrite config parser

duke8253/trafficserver,pbchou/trafficserver,duke8253/trafficserver,pbchou/trafficserver,dyrock/trafficserver,davidbz/trafficserver,pbchou/trafficserver,vmamidi/trafficserver,dyrock/trafficserver,davidbz/trafficserver,chitianhao/trafficserver,chitianhao/trafficserver,vmamidi/trafficserver,bryancall/trafficserver,dyrock/trafficserver,duke8253/trafficserver,vmamidi/trafficserver,duke8253/trafficserver,SolidWallOfCode/trafficserver,chitianhao/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,duke8253/trafficserver,chitianhao/trafficserver,vmamidi/trafficserver,SolidWallOfCode/trafficserver,davidbz/trafficserver,dyrock/trafficserver,bryancall/trafficserver,pbchou/trafficserver,dyrock/trafficserver,dyrock/trafficserver,duke8253/trafficserver,bryancall/trafficserver,davidbz/trafficserver,SolidWallOfCode/trafficserver,pbchou/trafficserver,SolidWallOfCode/trafficserver,chitianhao/trafficserver,bryancall/trafficserver,SolidWallOfCode/trafficserver,bryancall/trafficserver,dyrock/trafficserver,duke8253/trafficserver,davidbz/trafficserver,bryancall/trafficserver,vmamidi/trafficserver,vmamidi/trafficserver,davidbz/trafficserver,chitianhao/trafficserver,pbchou/trafficserver,chitianhao/trafficserver