[RELEASE] Released version 2.0.24

Released version 2.0.24 with the following main changes :
    - BUG/MEDIUM: tcp-check: Do not dereference inexisting connection
    - BUILD: add detection of missing important CFLAGS
    - BUG/MEDIUM: mworker: do not register an exit handler if exit is expected
    - BUG/MINOR: mworker: do not export HAPROXY_MWORKER_REEXEC across programs
    - BUG/MINOR: systemd: must check the configuration using -Ws
    - BUG/MINOR: mux-h2: Obey dontlognull option during the preface
    - BUG/MEDIUM: mux-h2: Handle remaining read0 cases on partial frames
    - BUG/MINOR: connection: Add missing error labels to conn_err_code_str
    - BUG/MINOR: server: update last_change on maint->ready transitions too
    - MINOR: spoe: Add a pointer on the filter config in the spoe_agent structure
    - BUG/MEDIUM: spoe: Create a SPOE applet if necessary when the last one is released
    - BUG/MEDIUM: spoe: Fix policy to close applets when SPOE connections are queued
    - DOC: Improve the lua documentation
    - DOC: config: Fix 'http-response send-spoe-group' documentation
    - MINOR: mux-h1/proxy: Add a proxy option to disable clear h2 upgrade
    - DOC/MINOR: fix typo in management document
    - BUG/MAJOR: h2: enforce stricter syntax checks on the :method pseudo-header
    - REGTESTS: add a test to prevent h2 desync attacks
4 files changed