[RELEASE] Released version 2.8-dev9

Released version 2.8-dev9 with the following main changes :
    - MINOR: quic: Move traces at proto level
    - BUG/MINOR: quic: Possible memory leak from TX packets
    - BUG/MINOR: quic: Possible leak during probing retransmissions
    - BUG/MINOR: quic: Useless probing retransmission in draining or killing state
    - BUG/MINOR: quic: Useless I/O handler task wakeups (draining, killing state)
    - CLEANUP: quic: rename frame types with an explicit prefix
    - CLEANUP: quic: rename frame variables
    - CLEANUP: quic: Remove useless parameters passes to qc_purge_tx_buf()
    - CLEANUP: quic: Rename <buf> variable to <token> in quic_generate_retry_token()
    - CLEANUP: quic: Rename <buf> variable into quic_padding_check()
    - CLEANUP: quic: Rename <buf> variable into quic_rx_pkt_parse()
    - CLEANUP: quic: Rename <buf> variable for several low level functions
    - CLEANUP: quic: Make qc_build_pkt() be more readable
    - CLEANUP: quic: Rename quic_get_dgram_dcid() <buf> variable
    - CLEANUP: quic: Rename several <buf> variables at low level
    - CLEANUP: quic: Rename <buf> variable into quic_packet_read_long_header()
    - CLEANUP: quic: Rename <buf> variable into qc_parse_hd_form()
    - CLEANUP: quic: Rename several <buf> variables into quic_sock.c
    - DEBUG: crash using an invalid opcode on x86/x86_64 instead of an invalid access
    - DEBUG: crash using an invalid opcode on aarch64 instead of an invalid access
    - DEV: h2: add a script "mkhdr" to build h2 frames from scratch
    - DEV: h2: support reading frame payload from a file
    - MINOR: acme.sh: add the deploy script for acme.sh in admin directory
    - BUG/MEDIUM: mux-quic: do not emit RESET_STREAM for unknown length
    - BUG/MEDIUM: mux-quic: improve streams fairness to prevent early timeout
    - BUG/MINOR: quic: prevent buggy memcpy for empty STREAM
    - MINOR: mux-quic: do not set buffer for empty STREAM frame
    - MINOR: mux-quic: do not allocate Tx buf for empty STREAM frame
    - MINOR: quic: finalize affinity change as soon as possible
    - BUG/MINOR: quic: fix race on quic_conns list during affinity rebind
    - CI: switch to Fastly CDN to download LibreSSL
    - BUILD: ssl: switch LibreSSL to Fastly CDN
    - BUG/MINOR: clock: fix a few occurrences of 'now' being used in place of 'date'
    - BUG/MINOR: spoe: use "date" not "now" in debug messages
    - BUG/MINOR: activity: show wall-clock date, not internal date in show activity
    - BUG/MINOR: opentracing: use 'date' instead of 'now' in debug output
    - Revert "BUG/MINOR: clock: fix a few occurrences of 'now' being used in place of 'date'"
    - BUG/MINOR: calltrace: fix 'now' being used in place of 'date'
    - BUG/MINOR: trace: show wall-clock date, not internal date in show activity
    - BUG/MINOR: hlua: return wall-clock date, not internal date in core.now()
    - BUG/MEDIUM: spoe: Don't start new applet if there are enough idle ones
    - BUG/MINOR: stconn: Fix SC flags with same value
    - BUG/MINOR: resolvers: Use sc_need_room() to wait more room when dumping stats
    - BUG/MEDIUM: tcpcheck: Don't eval custom expect rule on an empty buffer
    - BUG/MINOR: stats: report the correct start date in "show info"
    - MINOR: time: add conversions to/from nanosecond timestamps
    - MINOR: time: replace calls to tv_ms_elapsed() with a linear subtract
    - MINOR: spoe: switch the timeval-based timestamps to nanosecond timestamps
    - MEDIUM: tree-wide: replace timeval with nanoseconds in tv_accept and tv_request
    - MINOR: stats: use nanoseconds, not timeval to compute uptime
    - MINOR: activity: use nanoseconds, not timeval to compute uptime
    - MINOR: checks: use a nanosecond counters instead of timeval for checks->start
    - MINOR: clock: do not use now.tv_sec anymore
    - MEDIUM: clock: replace timeval "now" with integer "now_ns"
    - MINOR: clock: replace the timeval start_time with start_time_ns
    - MINOR: sample: Add bc_rtt and bc_rttvar
    - MINOR: quic: use real sending rate measurement
    - MINOR: proxy: factorize send rate measurement
4 files changed