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Normalizes metrics according to the Prometheus upstream metric guidelines available at https://prometheus.io/docs/practices/naming/. Drops the `hostapd_station_wpa` metric, because it is misleading, as it is not a differentiator between WPA versions, like one could be led to assume. Exposes more flags in a more consistent manner. Their metric was previously only exposed if the flag was present, but not if it wasn't. The same applies issue was fixed with regards to vht caps. After this commit the following breaking changes are in place: - All flags have been moved below `hostapd_station_flags_$flagname`: - `hostapd_station_ht` is now `hostapd_station_flag_ht` - `hostapd_station_mfp` is now `hostapd_station_flag_mfp` - `hostapd_station_vht` is now `hostapd_station_flag_vht` - `hostapd_station_wmm` is now `hostapd_station_flag_wmm` - New flags have been exposed: - `hostapd_station_flag_he` for high-efficency connections - `hostapd_station_flag_short_preamble` for short preamble connections - `hostapd_station_flag_auth` for authentication state - `hostapd_station_flag_assoc` for association state - Some metrics have had their unit normalized to the SI base unit or embedded into the metrics name: - `hostapd_station_inactive_msec` is now `hostapd_station_inactive_seconds`, the value is still float64 and as such has enough precision anyway, but becomes easier to reason about - `hostapd_station_connected_time` has been renamed to `hostapd_station_connected_seconds_total` so the unit, as well as the nature of the counter is reflected - `hostapd_station_signal` now includes its unit and is therefore named `hostapd_station_signal_dbm` - The packet counter metrics have been normalized to what the node exporter uses, so it is more in line with the defaults in the Prometheus ecosystem: - `hostapd_station_rx_packets` is now `hostapd_station_receive_packets_total` - `hostapd_station_rx_bytes` is now `hostapd_station_receive_bytes_total` - `hostapd_station_tx_packets` is now `hostapd_station_transmit_packets_total` - `hostapd_station_tx_bytes` is now `hostapd_station_transmit_bytes_total` Signed-off-by: Martin Weinelt <hexa@darmstadt.ccc.de>