Log Message:
Update www/trafficserver to 7.1.1

- Can't convert Cache Result to Cache MISS by
  TSHttpTxnCacheLookupStatusSet
- Unit Tests for Issue #1605 AWS Signature Version 4
- Issue #1685: Use TS_MILESTONE_UA_BEGIN for cqt* log fields
- ua_buffer_reader should be released in deallocate_redirect_postdata
- Be less aggressive in calling SSL_shutdown.
- Fixed debug build on Fedora 26 with gcc7
- Prevent HSTS headers from including the terminating null byte.
- Fix origin requests to default to HTTP 1.1
- Rework SSL handshake hooks and add tls_hooks tests.
- For 7.1.x, H2 Assertsion at Http2DependencyTree::deactivate
- Push triggered DNSConnections into an atomic queue to prevent
  DNSConnection lost.
- cqtq,cqtn,cqtd,cqtt timestamp blog format to be INT again
- Remove the correct entry from priority queue and insert the new node
  into the queue
- Backport PR 2336 to 7.1.x - Add missing checks for request url
- Backport PR 2338 to 7.1.x - Add null pointer check to server response
  set status in Lua plugin
- Change from SHA1 to SHA512
- Fedora 26 and gcc7 support for ATS 7.1.1
- Prefer setting AM_CPPFLAGS vs. CPPFLAGS, etc.
- Added more fallthrough comments for Fedora 26 and gcc7 for ICP
- Correctly Handle EVENT_NONE in UnixNetVConnection::acceptEvent
- Out-of-bounds while get port from host field
- AWS auth v4: fixed query param value URI-encoding
- Ticket file reload shouldn't kill traffic_server process
- FD leaks when ep.start() failed or cancelled in acceptEvent or
  con.connect() failed
- Cherry pick a set of Catch based commits to 7.1
- Coverity: CID 1380042:Resource leaks  (RESOURCE_LEAK)
- fixing memory leak when ATS serves stale records
- S3_auth:uri(En|De)code() pass by ref,not val(master)