Changes since version 2.4-dev18 :

Amaury Denoyelle (4):
      MINOR: srv: close all idle connections on shutdown
      MINOR: connection: move session_list member in a union
      MEDIUM: mux_h1: release idling frontend conns on soft-stop
      MEDIUM: connection: close front idling connection on soft-stop

Christopher Faulet (1):
      BUG/MINOR: hlua: Don't rely on top of the stack when using Lua buffers

Ilya Shipitsin (1):
      CI: Github Actions: switch to LibreSSL-3.3.3

William Lallemand (1):
      BUG/MINOR: ssl/cli: fix a lock leak when no memory available

Willy Tarreau (13):
      BUG/MEDIUM: cli: prevent memory leak on write errors
      MINOR: debug: add a new "debug dev sym" command in expert mode
      MINOR: pools/debug: slightly relax DEBUG_DONT_SHARE_POOLS
      MINOR: tools: add functions to retrieve the address of a symbol
      CLEANUP: activity: mark the profiling and task_profiling_mask __read_mostly
      MINOR: activity: add a "memory" entry to "profiling"
      MINOR: activity: declare the storage for memory usage statistics
      MEDIUM: activity: collect memory allocator statistics with USE_MEMORY_PROFILING
      MINOR: activity: clean up the show profiling io_handler a little bit
      MINOR: activity: make "show profiling" support a few arguments
      MINOR: activity: make "show profiling" also dump the memoery usage
      MINOR: activity: add the profiling.memory global setting
      BUILD: makefile: add new option USE_MEMORY_PROFILING