bintrans: disable argument permutation for qp and base64

Err on the side of caution and revert to the BSD-style getopt(3)
behavior for argument processing, as it's harder to go back and it's
not cle

bintrans: disable argument permutation for qp and base64

Err on the side of caution and revert to the BSD-style getopt(3)
behavior for argument processing, as it's harder to go back and it's
not clear that this was strictly intentional.

This is the difference between allowing `base64 /COPYRIGHT -w 80` and
forcing `base64 -w 80 /COPYRIGHT`.

Reviewed by: emaste, pstef
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D48483

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