Interesting changes since the last release:-
- Add [tryboot] conditional statement to autoboot.txt + tryboot_a_b mode
- Support custom OTP mac addresses
- Increase TFTP_MAX_BLOCK_SIZE
- Stop NVMe cleanly
- Fixes for NETCONSOLE parsing and initialisation.
- Long filename support for start_file / fixup_file.
- Secure boot and display debug info on the diagnostics screen.