adds clarifications on plugin use
adds clarifications on plugin use

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