Add ports_collector

[deadtrickster]

Steal everything from recon/port_info

[deadtrickster]

All metrics are counters and aggregated by name:

ports_total{name="name"},
ports_open{name="name"},
ports_input_bytes{name="name"}
ports_links{name="name"}
ports_locking{name="name", level="level"}
ports_allocated_bytes{name="name"}
ports_monitors{name="name"}
ports_monitored_by{name="name"}
ports_os_pids{name="name"}
ports_output_bytes{name="name"}
ports_parallelism{name="name", parallelism="true|false"}
ports_queue_bytes{name="name"}