Changes since version 2.4-dev3 :

Christopher Faulet (2):
      BUG/MEDIUM: lb-leastconn: Reposition a server using the right eweight
      BUG/MEDIUM: mux-h1: Fix a deadlock when a 408 error is pending for a client

Ilya Shipitsin (2):
      BUILD: SSL: fine guard for SSL_CTX_add_server_custom_ext call
      CI: cirrus: drop CentOS 6 builds

Miroslav Zagorac (4):
      MINOR: vars: replace static functions with global ones
      MINOR: opentracing: add ARGC_OT enum
      CONTRIB: opentracing: add the OpenTracing filter
      DOC: opentracing: add the OpenTracing filter section

Remi Tricot-Le Breton (4):
      BUG/MAJOR: cache: Crash because of disabled entry not removed from the tree
      MEDIUM: cache: Add a secondary entry counter and insertion limitation
      MEDIUM: cache: Avoid going over duplicates lists too often
      MINOR: cache: Add a max-secondary-entries cache option

William Lallemand (1):
      BUG/MEDIUM: ssl/crt-list: bad behavior with "commit ssl cert"

Willy Tarreau (2):
      BUILD: Makefile: have "make clean" destroy .o/.a/.s in contrib subdirs as well
      REGTESTS: make use of HAPROXY_ARGS and pass -dM by default