Add mkheader convenience script.
Add mkheader convenience script.

vmamidi/trafficserver,pbchou/trafficserver,chitianhao/trafficserver,duke8253/trafficserver,rpufky/trafficserver,reveller/trafficserver,rahmalik/trafficserver,reveller/trafficserver,pbchou/trafficserver,vmamidi/trafficserver,rahmalik/trafficserver,reveller/trafficserver,chenglongwei/trafficserver,persiaAziz/trafficserver,reveller/trafficserver,persiaAziz/trafficserver,davidbz/trafficserver,pbchou/trafficserver,bryancall/trafficserver,pbchou/trafficserver,taoyunxing/trafficserver,SolidWallOfCode/trafficserver,reveller/trafficserver,reveller/trafficserver,chenglongwei/trafficserver,chenglongwei/trafficserver,PSUdaemon/trafficserver,davidbz/trafficserver,dyrock/trafficserver,persiaAziz/trafficserver,vmamidi/trafficserver,chenglongwei/trafficserver,rpufky/trafficserver,clearswift/trafficserver,rpufky/trafficserver,rpufky/trafficserver,clearswift/trafficserver,taoyunxing/trafficserver,davidbz/trafficserver,vmamidi/trafficserver,bryancall/trafficserver,dyrock/trafficserver,duke8253/trafficserver,persiaAziz/trafficserver,clearswift/trafficserver,PSUdaemon/trafficserver,reveller/trafficserver,PSUdaemon/trafficserver,rahmalik/trafficserver,davidbz/trafficserver,rahmalik/trafficserver,rahmalik/trafficserver,taoyunxing/trafficserver,persiaAziz/trafficserver,pbchou/trafficserver,bryancall/trafficserver,rpufky/trafficserver,taoyunxing/trafficserver,chitianhao/trafficserver,dyrock/trafficserver,SolidWallOfCode/trafficserver,chitianhao/trafficserver,persiaAziz/trafficserver,persiaAziz/trafficserver,clearswift/trafficserver,rpufky/trafficserver,rahmalik/trafficserver,rahmalik/trafficserver,chenglongwei/trafficserver,PSUdaemon/trafficserver,reveller/trafficserver,clearswift/trafficserver,bryancall/trafficserver,taoyunxing/trafficserver,dyrock/trafficserver,taoyunxing/trafficserver,taoyunxing/trafficserver,chenglongwei/trafficserver,duke8253/trafficserver,dyrock/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,chitianhao/trafficserver,SolidWallOfCode/trafficserver,PSUdaemon/trafficserver,clearswift/trafficserver,rpufky/trafficserver,SolidWallOfCode/trafficserver,davidbz/trafficserver,rpufky/trafficserver,duke8253/trafficserver,dyrock/trafficserver,taoyunxing/trafficserver,chenglongwei/trafficserver,reveller/trafficserver,rahmalik/trafficserver,chenglongwei/trafficserver,vmamidi/trafficserver,rpufky/trafficserver,clearswift/trafficserver,chitianhao/trafficserver,chitianhao/trafficserver,vmamidi/trafficserver,PSUdaemon/trafficserver,duke8253/trafficserver,clearswift/trafficserver,persiaAziz/trafficserver,pbchou/trafficserver,duke8253/trafficserver,PSUdaemon/trafficserver,PSUdaemon/trafficserver,bryancall/trafficserver,PSUdaemon/trafficserver,bryancall/trafficserver,chitianhao/trafficserver,dyrock/trafficserver,duke8253/trafficserver,davidbz/trafficserver,clearswift/trafficserver,SolidWallOfCode/trafficserver,rahmalik/trafficserver,taoyunxing/trafficserver