`extra::getopts::opt_val` is private, but `rustpkg` managed to use it due to privacy bugs.

[Kimundi]

@catamorphism you're the one who handles rustpkg, right? Can you take a look on whether those two getopts methods are necessary there? Alternatively, document what they actually do and make them officially public. I still have no idea what half the things in getopts actually do.

[huonw]

Couldn't the function be made public?

[Kimundi]

@huonw I have some aversion against making two undocumented functions public that I do not understand, despite both being only like 5 lines of code.

[catamorphism]

They should be public. I'll fix this.