[TS-3881] docs for new API.
[TS-3881] docs for new API.

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