Merge v4.0

[nseidle]

Note: If you are running firmware v3.x or greater, you can load the latest firmware or release candidate over the air. If you are using older firmware (2.x or lower) you will need to load the latest firmware using a USB connection. We have created a Windows GUI to ease this process. Please see Updating Firmware from GUI for a step by step process.

Changes in this release:

• Bug Lot of RTK Fix lost since firmware 3.6 #733 - Increase the default Bluetooth RX buffer to 2k to prevent RTCM loss.
• Bug Device incorrect identifies as RTK Surveyor #737 - Correct the device ID process to allow for more variance in units with bad ADC fuses.
• Bug Bluetooth is disabled after key update via serial #738 - Correctly restart Bluetooth after manual L-Band key update.
• Bug GNSS RTK Facet hard locks, unable to power off using button push #741 - Correctly configure WiFi protocol during AP mode. Fix display 'RTK Config' if config falls back to AP Config mode.
• Bug OTA firmware update fails when updating to version greater than 3.9 #742 - Correct how newer version numbers are detected.
• Feature AP Config menu - add function to force update of L-Band Keys (perhaps on next reboot?) #736 - Add GetKeys display option to L-Band units to force update the keys.
• Feature Need ability to disable USB, DATA, and RADIO ports #734 - Add options to disabled RADIO, DATA, and USB ports.
• Add 'Account Expired' (PointPerfect subscription expired) and 'Not Listed' (device not on whitelist) displayed errors to L-Band.