Data for UAP's is (now?) encapsulated within 'stat'->'ap', changed reference to reflect this change.
Also: Fixed handling of uninitialized values in case they do not exist (// 0).
It seems to be possible, that the response lacks the values for
`rx_errors` and `tx_errors`. This should not result in warnings due to
undefined values.
Thanks, kboenke!
Closes: #1095
Plugins available:
* unifi_api - Providing the following graphs:
* unifi_clients_by_device - Count the number of clients connected on a per-device basis
* unifi_clients_by_network - Count the number of clients connected to each named network
* unifi_device_stats - Get basic stats from each unifi device - cpu, memory, load average, and uptime
* unifi_xfer_by_device - Transfer stats on a per-device basis
* unifi_xfer_by_network - Transfer stats on a per-network basis
* unifi_xfer_by_port - Transfer stats per switch port
* unifi_xfer_by_uplink - Overall transfer with speedtest stats
Dennis Paul