[TS-3927] update docs.
[TS-3927] update docs.

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