Traffic Dump documentation for post_process.py (#7161)
Traffic Dump documentation for post_process.py (#7161)

This makes some tweaks to the Traffic Dump documentation wording and
adds information about post_process.py

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