TS-1441 fix possible null reference to configuration in gzip plugin
TS-1441 fix possible null reference to configuration in gzip plugin

Author: Otto van der Schaaf <f82e1104fcd8bfffc72e7185709f7902b0b97ebf@apache.org>

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