Changes since version 2.5.4 :

Christopher Faulet (4):
      BUG/MEDIUM: mux-fcgi: Don't rely on SI src/dst addresses for FCGI health-checks
      BUG/MEDIUM: htx: Fix a possible null derefs in htx_xfer_blks()
      REGTESTS: fix the race conditions in normalize_uri.vtc
      REGTESTS: fix the race conditions in secure_memcmp.vtc

Ilya Shipitsin (3):
      CI: github actions: use cache for OpenTracing
      CI: refactor OpenTracing build script
      CI: github actions: use cache for SSL libs

Tim Duesterhus (1):
      CI: Consistently use actions/checkout@v2

William Lallemand (1):
      BUG/MEDIUM: httpclient/lua: infinite appctx loop with POST

Willy Tarreau (3):
      CI: github actions: add the output of $CC -dM -E-
      BUILD: atomic: make the old HA_ATOMIC_LOAD() support const pointers
      BUILD: tree-wide: mark a few numeric constants as explicitly long long