[RELEASE] Released version 2.1.8

[RELEASE] Released version 2.1.8

Released version 2.1.8 with the following main changes :
    - BUG/MEDIUM: log: don't hold the log lock during writev() on a file descriptor
    - BUG/MEDIUM: pattern: fix thread safety of pattern matching
    - BUILD: make dladdr1 depend on glibc version and not __USE_GNU
    - REGTESTS: Add missing OPENSSL to REQUIRE_OPTIONS for lua/txn_get_priv
    - REGTESTS: Add missing OPENSSL to REQUIRE_OPTIONS for compression/lua_validation
    - BUG/MINOR: ssl: fix ssl-{min,max}-ver with openssl < 1.1.0
    - BUG/MEDIUM: ssl: crt-list must continue parsing on ERR_WARN
    - MINOR: http: Add 410 to http-request deny
    - MINOR: http: Add 404 to http-request deny
    - BUG/MINOR: http: make smp_fetch_body() report that the contents may change
    - BUG/MINOR: tcp-rules: tcp-response must check the buffer's fullness
    - BUG/MEDIUM: ebtree: use a byte-per-byte memcmp() to compare memory blocks
    - BUG/MINOR: spoe: add missing key length check before checking key names
    - BUG/MINOR: cli: allow space escaping on the CLI
    - BUG/MINOR: mworker/cli: fix the escaping in the master CLI
    - BUG/MINOR: mworker/cli: fix semicolon escaping in master CLI
    - REGTEST: http-rules: test spaces in ACLs
    - REGTEST: http-rules: test spaces in ACLs with master CLI
    - MEDIUM: map: make the "clear map" operation yield
    - BUG/MINOR: systemd: Wait for network to be online
    - REGTEST: Add a simple script to tests errorfile directives in proxy sections
    - BUG/MINOR: spoe: correction of setting bits for analyzer
    - BUG/MINOR: http_ana: clarify connection pointer check on L7 retry
    - MINOR: spoe: Don't systematically create new applets if processing rate is low
    - REGTEST: ssl: tests the ssl_f_* sample fetches
    - REGTEST: ssl: add some ssl_c_* sample fetches test
    - BUG/MEDIUM: fetch: Fix hdr_ip misparsing IPv4 addresses due to missing NUL
    - MINOR: cli: make "show sess" stop at the last known session
    - DOC: ssl: add "allow-0rtt" and "ciphersuites" in crt-list
    - BUG/MEDIUM: pattern: Add a trailing \0 to match strings only if possible
    - BUG/MINOR: proxy: fix dump_server_state()'s misuse of the trash
    - BUG/MINOR: proxy: always initialize the trash in show servers state
    - DOC: configuration: add missing index entries for tune.pool-{low,high}-fd-ratio
    - DOC: configuration: fix alphabetical ordering for tune.pool-{high,low}-fd-ratio
    - BUILD: haproxy: fix build error when RLIMIT_AS is not set
    - BUG/MINOR: http_act: don't check capture id in backend (2)
    - BUG/MINOR: mux-h1: Fix the splicing in TUNNEL mode
    - BUG/MINOR: mux-h1: Don't read data from a pipe if the mux is unable to receive
    - BUG/MINOR: mux-h1: Disable splicing only if input data was processed
    - BUG/MEDIUM: mux-h1: Disable splicing for the conn-stream if read0 is received
    - MINOR: mux-h1: Improve traces about the splicing
    - BUG/MEDIUM: mux-h1: Subscribe rather than waking up in h1_rcv_buf()
    - MINOR: connection: move the CO_FL_WAIT_ROOM cleanup to the reader only
    - BUG/MEDIUM: connection: Continue to recv data to a pipe when the FD is not ready
    - BUG/MINOR: backend: Remove CO_FL_SESS_IDLE if a client remains on the last server
    - MINOR: http: Add support for http 413 status
    - DOC: configuration: remove obsolete mentions of H2 being converted to HTTP/1.x
    - BUG/MINOR: sample: Free str.area in smp_check_const_bool
    - BUG/MINOR: sample: Free str.area in smp_check_const_meth
    - BUG/MEDIUM: lists: add missing store barrier on MT_LIST_BEHEAD()
    - BUG/MEDIUM: lists: add missing store barrier in MT_LIST_ADD/MT_LIST_ADDQ
    - CONTRIB: da: fix memory leak in dummy function da_atlas_open()
    - BUG/MEDIUM: mux-h1: Continue to process request when switching in tunnel mode
    - BUG/MINOR: mux-fcgi: Handle empty STDERR record
    - BUG/MINOR: mux-fcgi: Set conn state to RECORD_P when skipping the record padding
    - BUG/MINOR: mux-fcgi: Set flags on the right stream field for empty FCGI_STDOUT
    - BUG/MEDIUM: log: issue mixing sampled to not sampled log servers.
    - BUG/MEDIUM: fcgi-app: fix memory leak in fcgi_flt_http_headers
    - BUG/MEDIUM: server: resolve state file handle leak on reload
    - BUG/MEDIUM: server: fix possibly uninitialized state file on close
    - BUG/MEDIUM: channel: Be aware of SHUTW_NOW flag when output data are peeked
    - BUILD: ebtree: fix build on libmusl after recent introduction of eb_memcmp()
    - REGEST: Add reg tests about error files
    - BUG/MINOR: threads: Don't forget to init each thread toremove_lock.
    - MINOR: pools: increase MAX_BASE_POOLS to 64
    - BUILD: thread: add parenthesis around values of locking macros
    - BUG/MINOR: cfgparse: don't increment linenum on incomplete lines
    - BUG/MEDIUM: resolve: fix init resolving for ring and peers section.
    - BUG/MAJOR: dns: Make the do-resolve action thread-safe
    - BUG/MEDIUM: dns: Release answer items when a DNS resolution is freed
    - BUG/MINOR: mux-fcgi: Don't url-decode the QUERY_STRING parameter anymore
    - BUG/MEDIUM: mux-h1: Wakeup the H1C in h1_rcv_buf() if more data are expected
    - BUG/MEDIUM: mux-h1: Disable the splicing when nothing is received
    - BUILD: tools: fix build with static only toolchains
    - BUG/MINOR: debug: Don't dump the lua stack if it is not initialized
    - MEDIUM: lua: Add support for the Lua 5.4
    - BUG/MEDIUM: dns: Don't yield in do-resolve action on a final evaluation
    - BUG/MINOR: tcp-rules: Set the inspect-delay when a tcp-response action yields
    - MINOR: connection: Preinstall the mux for non-ssl connect
    - MINOR: stream-int: Be sure to have a mux to do sends and receives
    - SCRIPTS: announce-release: add the link to the wiki in the announce messages
    - BUG/MEDIUM: backend: always attach the transport before installing the mux