net/haproxy: 3rd feature set for release 2.10

[fraenki]

full changelog added to #960

[fraenki]

@fichtner Is it too late for OPNsense 18.7.8?

[fraenki]

CPU Affinity Rules

Setup rules; they will globally be used if enabled:

Assign one or more CPU affinity rules to a Public Service (frontend):

This results in multiple HAProxy CPU affinity configurations:

global
    cpu-map                     1/1 0
    cpu-map                     2/all 0 1 2 3
    cpu-map                     all/2 8

frontend example
    bind-process 1 2
    bind 10.1.2.3:443 process 1/1 process 2/all

(This haproxy.conf is for demonstration purposes only, it's not considered particular useful.)

NOTE: It's absolutely possible to build nonfunctional combinations of rules, so be sure to always use the "Test Syntax" button before applying a new configuration.