wip/compare 1.16 NetBSD

This is a program that allows very fast binary file comparison.

Compare is similar to cmp but faster and with better readable output. Compare examines one file and standard in, or two files on a byte by byte basis, and prints the file position of the first difference it finds, first in decimal and then in hexadecimal, followed by the differing byte content in hexadecimal and as quoted character.