Document that hs.wifi.interfaceDetails['bssid'] only appears if hs.lo…

…cation has been started. Closes #2944

extensions/wifi/libwifi.m

@@ -339,7 +339,7 @@ static int wifi_current_ssid(lua_State* L) {
 /// * A table containing details about the interface. The table will contain the following keys:
 /// * active - The interface has its corresponding network service enabled.
 /// * activePHYMode - The current active PHY mode for the interface.
-/// * bssid - The current basic service set identifier (BSSID) for the interface.
+/// * bssid - The current basic service set identifier (BSSID) for the interface. Note that for this key to be available, hs.location needs to have been started
 /// * cachedScanResults - A table containing the networks currently in the scan cache for the WLAN interface. See [hs.wifi.backgroundScan](#backgroundScan) for details on the table format.
 /// * configuration - A table containing the current configuration for the given WLAN interface. This table will contain the following keys:
 /// * networkProfiles - A table containing an array of known networks for the interface. Entries in the array will each contain the following keys: