Changes since version 2.9.11 :

Amaury Denoyelle (6):
      BUG/MINOR: h1: do not forward h2c upgrade header token
      BUG/MINOR: h2: reject extended connect for h2c protocol
      MINOR: quic: convert qc_stream_desc release field to flags
      MINOR: quic: implement function to check if STREAM is fully acked
      BUG/MEDIUM: quic: handle retransmit for standalone FIN STREAM
      BUG/MINOR: quic: prevent freeze after early QCS closure

Christopher Faulet (5):
      MINOR: mux-h1: Set EOI on SE during demux when both side are in DONE state
      BUG/MEDIUM: mux-h1/mux-h2: Reject upgrades with payload on H2 side only
      REGTESTS: h1/h2: Update script testing H1/H2 protocol upgrades
      BUG/MINOR: mux-h1: Fix condition to set EOI on SE during zero-copy forwarding
      BUG/MINOR: http-ana: Disable fast-fwd for unfinished req waiting for upgrade

Oliver Dala (1):
      BUG/MEDIUM: cli: Deadlock when setting frontend maxconn

Valentine Krasnobaeva (1):
      BUG/MINOR: cfgparse-global: fix allowed args number for setenv

Willy Tarreau (14):
      REGTESTS: shorten a bit the delay for the h1/h2 upgrade test
      BUG/MINOR: server: make sure the HMAINT state is part of MAINT
      MINOR: task: define two new one-shot events for use with WOKEN_OTHER or MSG
      BUG/MEDIUM: stream: make stream_shutdown() async-safe
      BUG/MINOR: queue: make sure that maintenance redispatches server queue
      MINOR: server: make srv_shutdown_sessions() call pendconn_redistribute()
      BUG/MEDIUM: queue: always dequeue the backend when redistributing the last server
      MINOR: debug: make mark_tainted() return the previous value
      MINOR: chunk: drop the global thread_dump_buffer
      MINOR: debug: split ha_thread_dump() in two parts
      MINOR: debug: slightly change the thread_dump_pointer signification
      MINOR: debug: make ha_thread_dump_done() take the pointer to be used
      MINOR: debug: replace ha_thread_dump() with its two components
      MEDIUM: debug: on panic, make the target thread automatically allocate its buf