haproxy: updated to 2.5.3

2.5.3
- MINOR: sock: move the unused socket cleaning code into its own function
- BUG/MEDIUM: mworker: close unused transferred FDs on load failure
- BUG/MINOR: mworker: fix a FD leak of a sockpair upon a failed reload
- BUG/MINOR: sink: Use the right field in appctx context in release callback
- BUG/MEDIUM: resolvers: Really ignore trailing dot in domain names
- BUG/MEDIUM: fd: always align fdtab[] to 64 bytes
- BUG/MAJOR: compiler: relax alignment constraints on certain structures
- MINOR: httpclient: Don't limit data transfer to 1024 bytes
- BUG/MINOR: httpclient: reinit flags in httpclient_start()
- BUG/MINOR: mailers: negotiate SMTP, not ESMTP
- BUG/MINOR: ssl: Add missing return value check in ssl_ocsp_response_print
- BUG/MINOR: ssl: Fix leak in "show ssl ocsp-response" CLI command
- BUG/MINOR: ssl: Missing return value check in ssl_ocsp_response_print
- CLEANUP: httpclient/cli: fix indentation alignment of the help message
- BUG/MINOR: tools: url2sa reads ipv4 too far
- BUG/MEDIUM: httpclient: limit transfers to the maximum available room
- DEBUG: buffer: check in __b_put_blk() whether the buffer room is respected

2.5.2
- BUG/MEDIUM: connection: properly leave stopping list on error
- BUG/MEDIUM: htx: Adjust length to add DATA block in an empty HTX buffer
- BUG/MINOR: httpclient: don't send an empty body
- BUG/MINOR: httpclient: set default Accept and User-Agent headers
- BUG/MINOR: httpclient/lua: don't pop the lua stack when getting headers
- BUILD/MINOR: fix solaris build with clang.
- BUG/MEDIUM: server: avoid changing healthcheck ctx with set server ssl
- DOC: management: mark "set server ssl" as deprecated
- MEDIUM: cli: yield between each pipelined command
- MINOR: channel: add new function co_getdelim() to support multiple delimiters
- BUG/MINOR: cli: avoid O(bufsize) parsing cost on pipelined commands
- MEDIUM: h2/hpack: emit a Dynamic Table Size Update after settings change
- BUG/MEDIUM: cli: Never wait for more data on client shutdown
- BUG/MEDIUM: mcli: do not try to parse empty buffers
- BUG/MEDIUM: mcli: always realign wrapping buffers before parsing them
- BUG/MINOR: stream: make the call_rate only count the no-progress calls
- DEBUG: cli: add a new "debug dev fd" expert command
- BUILD: debug/cli: condition test of O_ASYNC to its existence
- DEBUG: pools: add new build option DEBUG_POOL_INTEGRITY
- REGTESTS: ssl: Fix ssl_errors regtest with OpenSSL 1.0.2
- BUG/MEDIUM: mworker: don't lose the stats socket on failed reload
- BUG/MINOR: mworker: does not add the -sf in wait mode
- BUG/MINOR: pools: always flush pools about to be destroyed
- DEBUG: pools: add extra sanity checks when picking objects from a local cache
- DEBUG: pools: let's add reverse mapping from cache heads to thread and pool
- DEBUG: pools: replace the link pointer with the caller's address on pool_free()
- BUG/MAJOR: sched: prevent rare concurrent wakeup of multi-threaded tasks
- BUG/MINOR: mworker: does not erase the pidfile upon reload
- DEBUG: fd: make sure we never try to insert/delete an impossible FD number
- MINOR: listener: replace the listener's spinlock with an rwlock
- BUG/MEDIUM: listener: read-lock the listener during accept()
- BUG/MINOR: httpclient: Revisit HC request and response buffers allocation
- BUG/MEDIUM: httpclient: Xfer the request when the stream is created
- BUG/MINOR: ssl: Remove empty lines from "show ssl ocsp-response <id>" output
- BUG/MINOR: jwt: Double free in deinit function
- BUG/MINOR: jwt: Missing pkey free during cleanup
- BUG/MINOR: jwt: Memory leak if same key is used in multiple jwt_verify calls
- BUG/MINOR: httpclient/cli: display junk characters in vsn
- BUG/MAJOR: http/htx: prevent unbounded loop in http_manage_server_side_cookies
- BUG/MAJOR: spoe: properly detach all agents when releasing the applet
- REGTESTS: server: close an occasional race on dynamic_server_ssl.vtc
- REGTESTS: peers: leave a bit more time to peers to synchronize
- BUG/MEDIUM: h2/hpack: fix emission of HPACK DTSU after settings change
- BUG/MINOR: mux-h2: update the session's idle delay before creating the stream

(adam)