[RELEASE] Released version 2.9.4

[RELEASE] Released version 2.9.4

Released version 2.9.4 with the following main changes :
    - BUG/MINOR: h3: fix checking on NULL Tx buffer
    - DOC: configuration: fix set-dst in actions keywords matrix
    - BUG/MEDIUM: mux-h2: refine connection vs stream error on headers
    - MINOR: mux-h2/traces: add a missing trace on connection WU with negative inc
    - BUG/MEDIUM: cli: some err/warn msg dumps add LR into CSV output on stat's CLI
    - BUG/MINOR: jwt: fix jwt_verify crash on 32-bit archs
    - BUG/MINOR: hlua: fix uninitialized var in hlua_core_get_var()
    - BUG/MEDIUM: cache: Fix crash when deleting secondary entry
    - BUG/MINOR: quic: newreno QUIC congestion control algorithm no more available
    - CLEANUP: quic: Remove unused CUBIC_BETA_SCALE_FACTOR_SHIFT macro.
    - MINOR: quic: Stop hardcoding a scale shifting value (CUBIC_BETA_SCALE_FACTOR_SHIFT)
    - MINOR: quic: extract qc_stream_buf free in a dedicated function
    - BUG/MEDIUM: quic: remove unsent data from qc_stream_desc buf
    - DOC: configuration: clarify http-request wait-for-body
    - BUG/MAJOR: ssl_sock: Always clear retry flags in read/write functions
    - MINOR: h3: add traces for stream sending function
    - BUG/MEDIUM: h3: do not crash on invalid response status code
    - BUG/MEDIUM: qpack: allow 6xx..9xx status codes
    - BUG/MEDIUM: quic: fix crash on invalid qc_stream_buf_free() BUG_ON
    - BUG/MINOR: h1: Don't support LF only at the end of chunks
    - BUG/MEDIUM: h1: Don't support LF only to mark the end of a chunk size
    - DOC: httpclient: add dedicated httpclient section
    - BUG/MINOR: h1-htx: properly initialize the err_pos field
    - BUG/MEDIUM: h1: always reject the NUL character in header values