Changes with Apache Traffic Server 7.1.3
  #2048 - Prevent potential dispatch of HttpTunnel events to a dead consumer.
  #2050 - Address session/transaction close errors.
  #2099 - Fix session-based memory leak.
  #2267 - Add diagram for header_rewrite Hooks
  #2515 - Fix timing error in the tls_hook10 test.
  #2766 - Move the postbuf into HttpSM
  #2986 - Modify regex_revalidate so that traffic_ctl may be used to trigger updates
  #2993 - Cherry pick and some manual fixes to address testing issues in 7.1
  #3001 - Fix an enum element mismatch between TSServerState and ServerState_t
  #3002 - new_MIOBuffer: uninitialized water_mark fix.
  #3022 - Do not send HSTS header when remap has failed
  #3029 - clang-format
  #3032 - Avoid copying over data in the write_vio into response_buffer
  #3043 - moves ocsp connect failures to Debug
  #3044 - Explicitly set enable_doc_build to yes if --enable-docs is provided to allow documentation and manpages build
  #3045 - Processing DNS reponses with CNAME & SRV records
  #3048 - Fix OCSP under OpenSSL 1.1.x
  #3063 - Fixes a warning from clang v6.x
  #3068 - Fixed crash in microserver help message
  #3070 - Fix X-Id logging for slow log
  #3075 - coverity 1385717: Out-of-bounds write
  #3076 - Note the stripe meta while clearing the stripe
  #3083 - Fix a bug that chunked resopnses aren't logged properly if the client side is H2
  #3085 - Heap use after free (backport #3069)
  #3096 - Send VC_EVENT_WRITE_READY/COMPLETE when write_vio is consumed
  #3106 - Adds a new configuration proxy.config.http.allow_multi_range
  #3108 - Restores traffic_top -s option to be in seconds
  #3109 - Handle MIME hdr parsing edge case
  #3113 - Decrement stream counts immediately when the stream is removed from stream_list
  #3120 - Use the correct Lua symbol for verify-server setting
  #3128 - Heap use after free in UnixNetVConnection
  #3134 - Test: fix string_view unit test.
  #3146 - Call mark_body_done() when response body is empty
  #3164 - Doc: Fix 7.1.x documentation building for Sphinx 1.7.0.
  #3172 - Issue #2963 - Remove TS.pm.in from copy
  #3184 - Doc for overridable client cert filename
  #3189 - Added a first cut of a .spec file, losely based on the Fedora repos
  #3190 - Fix the expression for checking file descriptor
  #3191 - Doc for ATS client tls configuration
  #3192 - Return 400 if there is whitespace after the field name and before the colon
  #3195 - Adds better sanity checks around the method IX
  #3196 - Backport of url_sig plugin from master to 7.1.x
  #3197 - Free Http2Stream directly when HttpSM is already gone or not allocated
  #3201 - Close the connection when returning a 400 error response
  #3205 - Isolate client ctx options from server options
  #3206 - Remove HAVE_POSIX_MEMALIGN related code
  #3219 - fix unpredictable diskok within CacheProcessor::start_internal
  #3220 - Support more redirect status codes - 303, 305.
  #3222 - Fix instability caused by HTTP2_SESSION_EVENT_FINI
  #3227 - Acquire lock before calling Http2ClientSession::free() from Http2ConnectionState
  #3228 - Combine mutex of Http2ClientSession and Http2ConnectionState
  #3230 - Removed MD5 signature files based on ASF updated release policy
  #3231 - Validate Content-Length headers for incoming requests
  #3233 - All or nothing for readIntoBuffer
  #3240 - Fixing #3232, crash when making a server push
  #3241 - Warning message when openning hostdb file fails
  #3243 - Make throttling feature more useful.
  #3247 - s3_auth: check if previous config (re)load failed
  #3252 - Print the volume path that is clearing its directories
  #3268 - Clear vio so lingering IO is not confused when error message is returned
  #3274 - Correct shutdown flag in UnixNetVConnection
  #3277 - Drain the request body if there is a cache hit.  Only drain if the
  #3285 - Stop connection reattempts on origin which sends EOS on no data.
  #3290 - Fix parent.config memory leak.
  #3302 - traffic_ctl host status changes.
  #3306 - Go into timeout state regardless of whether server response data was sent
  #3307 - Handle rescheduled transaction close event via tunnel.
  #3323 - Fixes various issues with brotli compression
  #3344 - Reject inaddr any 7.1.x backport
  #3355 - allow for specifying of brotli via --enable-brotli= or pkg-config
  #3360 - Potential traffic_cop crash due to leftover data in socket
  #3370 - Document proxy.config.ssl.client.cipher_suite
  #3401 - HostDB - removing infinite ttl (0)
  #3407 - Add nullptr checks in Http2Stream::update_write_request()
  #3412 - Fixed length calculation for url_sig excl regexes.
  #3413 - Fixes a case on chunked cached objects, 304s and Ranges