bintrans: disable argument permutation for qp and base64

[kevans]

Summary

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 base64 /COPYRIGHT -w 80 and
base64 -w 80 /COPYRIGHT.

[emaste]

This looks reasonable to me but could it be that whatever base64 exists on typical Linux distros allows "incorrect" argument order?

[kevans]

In D48483#1106209, @emaste wrote:

This looks reasonable to me but could it be that whatever base64 exists on typical Linux distros allows "incorrect" argument order?

Hmm... I was basing it off of the port (which doesn't), but the coreutils base64 is indeed different from that (and there's also a perl script I've seen used in places) and does do the GNU-style permutation.

[emaste]

If there are at least some other implementations in common use that don't support GNU-style my preference is for your change to go in.

[pstef]

I'm in favor of this change, but the previous version is OK too.