[RELEASE] Released version 2.1.10

[RELEASE] Released version 2.1.10

Released version 2.1.10 with the following main changes :
    - BUG/MEDIUM: ssl: crt-list negative filters don't work
    - MINOR: ssl: reach a ckch_store from a sni_ctx
    - BUILD: makefile: Fix building with closefrom() support enabled
    - BUG/MINOR: Fix several leaks of 'log_tag' in init().
    - DOC: tcp-rules: Refresh details about L7 matching for tcp-request content rules
    - BUG/MEDIUM: queue: make pendconn_cond_unlink() really thread-safe
    - MINOR: counters: fix a typo in comment
    - BUG/MINOR: stats: fix validity of the json schema
    - MINOR: hlua: Display debug messages on stderr only in debug mode
    - BUG/MINOR: peers: Inconsistency when dumping peer status codes.
    - BUG/MINOR: mux-h1: Always set the session on frontend h1 stream
    - BUG/MEDIUM: mux-fcgi: Don't handle pending read0 too early on streams
    - BUG/MEDIUM: mux-h2: Don't handle pending read0 too early on streams
    - BUG/MINOR: http-htx: Expect no body for 204/304 internal HTTP responses
    - BUG/MINOR: init: only keep rlim_fd_cur if max is unlimited
    - BUG/MINOR: mux-h2: do not stop outgoing connections on stopping
    - MINOR: fd: report an error message when failing initial allocations
    - BUG/MEDIUM: task: bound the number of tasks picked from the wait queue at once
    - BUG/MEDIUM: spoe: Unset variable instead of set it if no data provided
    - BUG/MEDIUM: mux-h1: Get the session from the H1S when capturing bad messages
    - BUG/MEDIUM: lb: Always lock the server when calling server_{take,drop}_conn
    - BUG/MINOR: peers: Possible unexpected peer seesion reset after collisions.
    - BUILD: ssl: make BoringSSL use its own version numbers
    - BUG/MINOR: disable dynamic OCSP load with BoringSSL
    - BUG/MEDIUM: ssl: OCSP must work with BoringSSL
    - BUG/MINOR: queue: properly report redistributed connections
    - BUG/MEDIUM: server: support changing the slowstart value from state-file
    - BUG/MINOR: http-ana: Don't send payload for internal responses to HEAD requests
    - BUG/MAJOR: mux-h2: Don't try to send data if we know it is no longer possible
    - BUG/MINOR: extcheck: add missing checks on extchk_setenv()
    - BUG/MINOR: log: fix memory leak on logsrv parse error
    - BUG/MINOR: server: fix srv downtime calcul on starting
    - BUG/MINOR: server: fix down_time report for stats
    - BUG/MINOR: lua: initialize sample before using it
    - MINOR: ist: Add a case insensitive istmatch function
    - BUG/MINOR: cache: Manage multiple values in cache-control header value
    - BUG/MINOR: cache: Inverted variables in http_calc_maxage function
    - BUG/MEDIUM: filters: Don't try to init filters for disabled proxies
    - BUG/MINOR: proxy/server: Skip per-proxy/server post-check for disabled proxies
    - BUG/MINOR: server: Set server without addr but with dns in RMAINT on startup
    - MINOR: server: Copy configuration file and line for server templates
    - BUG/MEDIUM: mux-pt: Release the tasklet during an HTTP upgrade
    - BUG/MINOR: filters: Skip disabled proxies during startup only
    - BUG/MEDIUM: stick-table: limit the time spent purging old entries
    - CLEANUP: mux-h2: Remove the h1 parser state from the h2 stream