[REWRITE] hexdump.c rewritten to use getopt32

[Mats Erik Andersson]

Fellow code workers,

let me post a recoding of hexdump.c that now uses
the functionality of getopt32. Since the difference
file is slightly larger than the rewritten code,
I post the full source.

Using bloat-o-meter, a decrease of 47 bytes is calculated.
However, due to the inherent construction of getopt32,
which scrambles any order of option flags, this version
of hexdump will only allow one hard coded ordering for
output: at present -b -c -d -o -x, one row after the other.
Is this really a serious shortcoming? For the moment I
offer the code as a starting point for further discussion.

Mats E Andersson
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