When establishing AgentX session with the master agent, we setup low
timeout and retries values. If the master agent is blocked, we will
wait for less than 1 second for them and therefore, there will be no
disruption for VRRP.

Write support is available for:
 - changing the weight of a real server

Write support is available for:
 - changing the base priority
 - changing instance preemption

Traps are sent when:
 - real server state changes
 - virtual server quorum state changes

Traps are sent when:
 - instance state changes
 - sync group state changes

IPVS stats are exported with SNMP. A cache is used to avoid to query
the kernel too much.

Most internal values can be queried using SNMP. The main exception is
the ability to query checkers which is not present.

Most internal data can be queried with SNMP.

 - autotools stuff
 - minimal MIB implementation
 - integration of NetSNMP into the main loop