Savecmos now appends a word representing Boot$OSVersion to the end of the 240 byte configuration.
Robert Sprowson authored
Loadcmos will now only load 240 byte configs on machines <= 370,and
will fault configs if the local Boot$OSVersion doesn't match that
stored at the end of the file,or if the checksum is wrong.
Most of the Loadcmos stuff is stolen from the old bootsequence util of
the same name.
Added 2 new error messages to the Messages file.

Version 1.29. Tagged as 'BootCmds-1_29'
77da27d5