As per project's README:
> Recent systems can resolve IPv6 host names using getaddrinfo(). This
> primitive is not present in all libcs and does not work in all of
> them either. Support in glibc was broken before 2.3. Some embedded
> libs may not properly work either, thus, support is disabled by
> default, meaning that some host names which only resolve as IPv6
> addresses will not resolve and configs might emit an error during
> parsing. If you know that your OS libc has reliable support for
> getaddrinfo(), you can add USE_GETADDRINFO=1 on the make command
> line to enable it. This is the recommended option for most Linux
> distro packagers since it's working fine on all recent mainstream
> distros. It is automatically enabled on Solaris 8 and above, as it's
> known to work.
Without this option, it is not possible for HAProxy to solve IPv6-only
names. This option is enabled in Debian builds without any notable
adverse effect.
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
