Changes with Apache Traffic Server 8.1.8
  #10128 - 8.1.x: Correctly handle encoding for cache hash generation
  #10132 - Updates to 8.1.x to compile on newer OSes
  #10133 - Remove duplicate slashes at the beginning of the incoming URL
  #10134 - 8.1.x: Fix a crash triggered by invalid range header
  #10140 - 81x mcx16 build fix