Release notes for recent AREDN nightly builds

The AREDN devs continue to crank out changes to the AREDN code base.  Here's a summary of what's been happening in the recent nightly builds:

Devices added back into the nightly build after recent big OpenWrt update:

• Mikrotik LDF 5
• Ubiquiti AirRouter

Bug fixes

• Fixed WAN VLAN detection on hAP
• Fixed idle tunnel quality check
• Fixed IBSS (Independent Basic Service Set) problem on 2.4GHz
• Enabled  negative channels for 2.4 GHz 802.11ac devices
• Fixed negative channels not beaconing.
• Fixed PowerBridge M upgrade

Enhancements

• Merged openwrt release 22.03.3
• Added a maximum timeout for service checks
• Made the default country HX (HAM)
• Improved the quality of the scan output
• Improved idle tunnel quality measurement
• Provided better error feedback when upgrades fail
• Tagged those devices which must be reinstalled.   (The NAND layout for a few Mikrotik devices has changed sufficiently that they cannot be easily upgraded and must be reinstalled from scratch.)

Over and above the neighbor status states of pending, active , etc., new states of "hidden" and "exposed" have been added.  

Because the nodes talk amongst themselves, your node knows which of its neighbor nodes are nearby but hidden from it  This can be useful for network management.  

Exposed nodes are nodes that you can see, but will block you from transmitting to other neighbors when they are transmitting.  It's a bit complex - see the 'exposed node problem' in Wikipedia for more detail   

The AREDN team hopes to use these parameters in the future to reduce channel congestion.