RabbitMQ internals monitoring by Zabbix

Continuation of extending zabbix-agent to monitor internals of applications. Now it's a RabbitMQ turn:


What's supported:

• File descriptors, Memory, Sockets watermarks monitoring
• Low level discovery of vhosts/queues
• Monitoring for messages, unack, consumers per queue
• Triggers for important counters
• Data sent in chunks, not one by one, using zabbix traps

Network socket state statistics monitoring by Zabbix

It's strange that zabbix-agent lacks for information about network socket states. At least it would be nice to monitor number of ESTAB, TIME_WAIT and CLOSE_WAIT connections.
Good that we can extend zabbix-agent - so I made this: