Browser accessible Diagnostic Log

[nielsonm236]

I've implemented a Browser accessible Diagnostic Log to aid in helping users with diagnosing unusual issues. Essentially the Diagnostic Log enables capture of "debug output" which can be coded on a case-by-case basis. It is similar to the UART based Debug Output capability that I use for development but does not require purchase and addition of a USB UART card.

Some notes:

• Only runs on UPG code as the I2C EEPROM is needed to store the log.
• Limited to capture of 32000 characters of debug information, but can be restarted without rebooting the HW-584. Capture size is limited by space available in the I2C EEPROM (Region 3).
• Only implemented on the "Browser UPG" code for the moment. I need to determine if it could be used on MQTT and Domoticz UPG builds.
• Since issue specific code needs to be written to help individual users the feature won't be released in General Releases ... unless I come up with some standard set of captures that might typical of information needed for any general case issue.