gcc9 - fix class Connection.
gcc9 - fix class Connection.

dyrock/trafficserver,duke8253/trafficserver,vmamidi/trafficserver,davidbz/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,davidbz/trafficserver,pbchou/trafficserver,davidbz/trafficserver,dyrock/trafficserver,davidbz/trafficserver,pbchou/trafficserver,bryancall/trafficserver,pbchou/trafficserver,SolidWallOfCode/trafficserver,duke8253/trafficserver,vmamidi/trafficserver,bryancall/trafficserver,bryancall/trafficserver,duke8253/trafficserver,pbchou/trafficserver,pbchou/trafficserver,bryancall/trafficserver,duke8253/trafficserver,dyrock/trafficserver,SolidWallOfCode/trafficserver,davidbz/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,duke8253/trafficserver,davidbz/trafficserver,duke8253/trafficserver,dyrock/trafficserver,vmamidi/trafficserver,vmamidi/trafficserver,pbchou/trafficserver,vmamidi/trafficserver,duke8253/trafficserver,dyrock/trafficserver,SolidWallOfCode/trafficserver,bryancall/trafficserver,dyrock/trafficserver,dyrock/trafficserver,bryancall/trafficserver,vmamidi/trafficserver