Generate an MD5, SHA1, SHA224, SHA256, SHA384 or SHA512 signature from input
file or string.

If no file is specified, any string following all the parameters is used

Input Variables :
    -i : file           no default
    -o : output file        default is to display only
    -Z : type           default: sha1
        md5 sha1 sha224 sha256 sha384 sha512
    -v : display version and exit

Version Control
;01a    30dec16 chris original

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