www/trafficserver: upgrade 6.2.3 -> 8.0.2
PR: 236049
Submitted by: Hung-Yi Chen <gaod@hychen.org> (maintainer)
Reviewed by: meta, pi
Relnotes: https://cwiki.apache.org/confluence/display/TS/What%27s+New+in+v7.0.x
https://cwiki.apache.org/confluence/display/TS/What%27s+New+in+v7.1.x https://cwiki.apache.org/confluence/display/TS/What%27s+New+in+v8.0.x