getopt_long issues

[Qwinci]

There are some issues with the current getopt_long implementation, namely:

• It incorrectly treats an argument following a short optional option as a value for that option (eg. in sed -i '<pattern>' optarg is incorrectly set to <pattern> when parsing -i).
• It doesn't move the non-arguments to the end of the argv array like it is supposed to do and set optind to the starting index of that contiguous sequence of non-options in case it reaches the end of argv.