middle copies infile to outfile, except the m first and the n last lines.
If infile has m+n or fewer lines, outfile will be empty.
m and n must be in the range 0 .. 2147483647.
If you don't specify infile, middle reads from standard input.
If you don't specify outfile, middle writes to standard output.
If you don't specify logfile, middle writes error messages to
standard error.
-v : Print version banner and usage info to standard error (or logfile, if given), then exit.