Log Message:
Update net/haproxy to 1.8.1

Major new features in 1.8:
- JSON stats
- server templates
- dynamic cookies
- per-certificate "bind" configuration
- pipelined and asynchronous SPOE
- seamless reloads
- PCRE2 support
- hard-stop-after
- support for OpenSSL asynchronous crypto engines
- replacement of the systemd-wrapper with a new master-worker model
- DNS autonomous resolver
- DNS SRV records
- configurable severity output on the CLI
- TLS 1.3 with support for Early-Data (AKA 0-RTT) on both sides
- multi-thread support
- HTTP/2 support
- small objects cache

For full changelog in 1.8, see:

  http://www.haproxy.org/download/1.8/src/CHANGELOG