[RELEASE] Released version 1.5.19

Released version 1.5.19 with the following main changes :
    - BUG/MAJOR: fix listening IP address storage for frontends
    - CLEANUP: connection: fix double negation on memcmp()
    - BUG/MEDIUM: sticktables: segfault in some configuration error cases
    - BUG/MINOR: http: add-header: header name copied twice
    - BUG/MINOR: ssl: fix potential memory leak in ssl_sock_load_dh_params()
    - BUG/MINOR: http: url32+src should use the big endian version of url32
    - BUG/MINOR: http: url32+src should check cli_conn before using it
    - DOC: http: add documentation for url32 and url32+src
    - MINOR: systemd: Use variable for config and pidfile paths
    - MINOR: systemd: Perform sanity check on config before reload
    - BUG/MINOR: init: always ensure that global.rlimit_nofile matches actual limits
    - BUG/MINOR: init: ensure that FD limit is raised to the max allowed
    - Revert "BUG/MINOR: ssl: fix potential memory leak in ssl_sock_load_dh_params()"
    - BUG/MEDIUM: stream-int: completely detach connection on connect error
    - DOC: minor typo fixes to improve HTML parsing by haproxy-dconv
    - BUG/MAJOR: compression: initialize avail_in/next_in even during flush
    - BUG/MAJOR: stick-counters: possible crash when using sc_trackers with wrong table
    - BUG/MAJOR: stream: properly mark the server address as unset on connect retry
    - BUG/MINOR: payload: fix SSLv2 version parser
    - MINOR: cli: allow the semi-colon to be escaped on the CLI
    - BUG/MINOR: displayed PCRE version is running release
    - MINOR: show Built with PCRE version
    - MINOR: show Running on zlib version
    - BUG/MINOR: ssl: Check malloc return code
    - BUG/MINOR: ssl: prevent multiple entries for the same certificate
    - BUG/MINOR: systemd: make the wrapper return a non-null status code on error
    - BUILD/CLEANUP: systemd: avoid a warning due to mixed code and declaration
    - BUG/MINOR: systemd: always restore signals before execve()
    - BUG/MINOR: systemd: check return value of calloc()
    - MINOR: systemd: report it when execve() fails
    - BUG/MEDIUM: systemd: let the wrapper know that haproxy has completed or failed
    - BUILD: poll: remove unused hap_fd_isset() which causes a warning with clang
    - DOC: Fix typo in description of `-st` parameter in man page
    - BUG/MEDIUM: peers: fix use after free in peer_session_create()
    - BUG/MEDIUM: systemd-wrapper: return correct exit codes
    - BUG/MINOR: stick-table: handle out-of-memory condition gracefully
    - BUG/MEDIUM: connection: check the control layer before stopping polling
    - BUG/MEDIUM: stick-table: fix regression caused by recent fix for out-of-memory
    - BUG/MINOR: cli: properly decrement ref count on tables during failed dumps
    - BUG/MINOR: cli: fix pointer size when reporting data/transport layer name
    - BUG/MINOR: cli: dequeue from the proxy when changing a maxconn
    - BUG/MEDIUM: proxy: return "none" and "unknown" for unknown LB algos
    - BUG/MINOR: http: don't send an extra CRLF after a Set-Cookie in a redirect
    - DOC: fix small typo in fe_id (backend instead of frontend)
    - BUG/MEDIUM: ssl: properly reset the reused_sess during a forced handshake
    - BUG/MINOR: backend: nbsrv() should return 0 if backend is disabled
    - BUG/MINOR: systemd: potential zombie processes
6 files changed