A POSIX-compatibility fix was introduced in 64740a0214 to make the
compilation of the `diffutils` port work, which expected a
`char* const* argv` signature.
And indeed, the POSIX spec does not mention permutation of `argv`:
https://pubs.opengroup.org/onlinepubs/9699919799/functions/getopt.html
However, most implementations do modify `argv` as evidenced by
documentation such as:
https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic
/LSB-Core-generic/libutil-getopt-3.html
"The function prototype was aligned with POSIX 1003.1-2008 (ISO/IEC
9945-2009) despite the fact that it modifies argv, and the library
maintainers are unwilling to change this."
Change the behavior back to permutate `argc` to allow for the following
command line argument order to work again:
unzip ./file.zip -o target-dir
Without this change, `./file.zip` in the example above would have been
ignored completely.
