Improve WAD traffic dispatcher

The WAD traffic dispatcher now allows incoming traffic to be directly distributed to the workers. This enhancement also allows source addresses to be exempt from proxy affinity, which allows traffic from the same source and different server to be distributed to workers in a round-robin configuration.

Use the following debugging command to verify that the WAD dispatcher distributed the traffic to the WAD workers:

# diagnose test application wad 12<integer><integer>

Use the index 1299 for all listeners.

To distribute traffic to different WAD workers:

config web-proxy global
    set proxy-fqdn "default.fqdn"
    set src-affinity-exempt-addr <IPv4 address> ...
    set src-affinity-exempt-addr6 <Pv6 address> ...
end

To verify the WAD dispatcher traffic distribution:

# diagnose test application wad 1204
Listener info: vf_id=0 local=0 port=(443) addr=[0.0.0.0]
        dispatcher fallback conn=0
        worker_idx=0 num_conn=3
        worker_idx=1 num_conn=1 

In this example, the WAD dispatcher distributed traffic to two WAD workers.