Changes with Apache Traffic Server 8.0.8
  #6703 - 8.0.x iocore/CacheRead: debug and txn abort with negative bytes on cache_seek
  #6706 - Fix AuTest (httpbin) againt 8.0.x
  #6787 - HPACK: send back an error to the client when the index is invalid
  #6922 - Fixed bug in the calculation of the header block fragment length
