haproxy: 1.8.9 -> 1.8.13 (#44487)

The patches previously applied have been included upstream. Upstream
changelog (only MAJOR/MEDIUM):

2018/07/30 : 1.8.13
    - BUG/MEDIUM: h2: don't accept new streams if conn_streams are still in excess
    - BUG/MEDIUM: h2: never leave pending data in the output buffer on close
    - BUG/MEDIUM: h2: make sure the last stream closes the connection after a timeout
    - BUG/MEDIUM: threads: Fix the exit condition of the thread barrier
    - BUG/MEDIUM: stream-int: don't immediately enable reading when the buffer was reportedly full
    - BUG/MEDIUM: stats: don't ask for more data as long as we're responding
    - BUG/MEDIUM: threads/sync: use sched_yield when available
    - BUG/MEDIUM: h2: prevent orphaned streams from blocking a connection forever
    - BUG/MEDIUM: threads: properly fix nbthreads == MAX_THREADS
    - BUG/MEDIUM: threads: unbreak "bind" referencing an incorrect thread number
    - MEDIUM: proxy_protocol: Convert IPs to v6 when protocols are mixed

2018/06/27 : 1.8.12
    - BUG/MAJOR: stick_table: Complete incomplete SEGV fix

2018/06/26 : 1.8.11
    - BUG/MAJOR: Stick-tables crash with segfault when the key is not in the stick-table

2018/06/22 : 1.8.10
    - BUG/MEDIUM: spoe: Flags are not encoded in network order
    - BUG/MEDIUM: contrib/mod_defender: Use network order to encode/decode flags
    - BUG/MEDIUM: contrib/modsecurity: Use network order to encode/decode flags
    - BUG/MEDIUM: cache: don't cache when an Authorization header is present
    - BUG/MEDIUM: dns: Delay the attempt to run a DNS resolution on check failure.
    - BUG/MEDIUM: fd: Only check update_mask against all_threads_mask.
    - BUG/MEDIUM: servers: Add srv_addr default placeholder to the state file
    - BUG/MEDIUM: lua/socket: Length required read doesn't work
    - BUG/MEDIUM: stick-tables: Decrement ref_cnt in table_* converters
    - BUG/MEDIUM: spoe: Return an error when the wrong ACK is received in sync mode
    - BUG/MEDIUM: lua/socket: wrong scheduling for sockets
    - BUG/MAJOR: lua: Dead lock with sockets
    - BUG/MEDIUM: lua/socket: Notification error
    - BUG/MEDIUM: lua/socket: Sheduling error on write: may dead-lock
    - BUG/MEDIUM: lua/socket: Buffer error, may segfault
    - MAJOR: spoe: upgrade the SPOP version to 2.0 and remove the support for 1.0
    - BUG/MEDIUM: threads: handle signal queue only in thread 0
    - BUG/MAJOR: map: fix a segfault when using http-request set-map
    - BUG/MAJOR: ssl: Random crash with cipherlist capture
    - BUG/MAJOR: ssl: OpenSSL context is stored in non-reserved memory slot
    - BUG/MEDIUM: fd: Don't modify the update_mask in fd_dodelete().
    - BUG/MEDIUM: threads: Use the sync point to check active jobs and exit