getopts panics parsing non-UTF-8 arguments

[remram44]

Arguments are OsString objects. While parse() takes an IntoIterator<Item=AsRef<OsStr>> (which can safely accept env::args_os()), the Matches structure only gives out String objects, which can only be built for UTF-8.

I don't know if this can possibly be fixed without breaking anything, but new safe methods on Matches could certainly be introduced.

[remram44]

In fact the whole thing panics right now if you feed it a non-UTF-8 argument, so DON'T USE env::args_os()...