Problems:
Batch mode: Long VAX filenames are truncated at 8 characters before the type.
            CP/M filename characters converted to "A" if invalid on VAX.

Sometimes it may be advisable to DEFINE SYS$ERROR filename
to get error messages that may not go into XMODEM.LOG when XMODEM crashes
due to unexpected system error such as divide by zero, file open failure, etc.
during a file transfer.

Since XMODEM.LOG is kept in current directory, S *.* will typically crash
XMODEM when it tries to send XMODEM.LOG since it is open for write already.

From:	JANUS::SYSTEM       24-FEB-1986 23:52
To:	MANAGER
Subj:	transfer complete messages needed if not batch and is checksum ?