[RELEASE] Released version 2.8-dev11

[RELEASE] Released version 2.8-dev11

Released version 2.8-dev11 with the following main changes :
    - BUILD: debug: do not check the isolated_thread variable in non-threaded builds
    - BUILD: quic: fix build warning when threads are disabled
    - CI: more granular failure on generating build matrix
    - CLEANUP: quic: No more used q_buf structure
    - CLEANUP: quic: Rename several <buf> variables in quic_frame.(c|h)
    - CLEANUP: quic: Typo fix for quic_connection_id pool
    - BUG/MINOR: quic: Wrong key update cipher context initialization for encryption
    - BUG/MEDIUM: cache: Don't request more room than the max allowed
    - MEDIUM: stconn: Be sure to always be able to unblock a SC that needs room
    - EXAMPLES: fix IPV6 support for lua mailers script
    - BUILD: ssl: buggy -Werror=dangling-pointer since gcc 13.0
    - DOC: stconn: Update comments about ABRT/SHUT for stconn structure
    - BUG/MEDIUM: stats: Require more room if buffer is almost full
    - DOC: configuration: add info about ssl-engine for 2.6
    - BUG/MINOR: mux-quic: fix transport VS app CONNECTION_CLOSE
    - BUG/MEDIUM: mux-quic: wakeup tasklet to close on error
    - DEV: flags: add a script to decode most flags in the "show sess all" output
    - BUG/MINOR: quic: Possible crash when dumping version information
    - BUG/MINOR: config: make compression work again in defaults section
    - BUG/MEDIUM: stream: Forward shutdowns when unhandled errors are caught
    - MEDIUM: stream: Resync analyzers at the end of process_stream() on change
    - DEV: flags: add missing stream flags to show-sess-to-flags
    - DEV: flags/show-sess-to-flags: only retrieve hex digits from hex fields
    - DEV: flags/show-sess-to-flags: add support for color output
    - CLEANUP: src/listener.c: remove redundant NULL check