Updating patch after Benjamin's review.

In this new patch, in test_regrtest I now use the current, actual getopt code to test and demonstrate backwards compatibility.  Note that when I pasted the code, I also fixed the three typos in the current getopt code that are documented in the following three issues: issue15324, issue15325, issue15326.  These typos are checked by the following test cases: test_fromfile, test_match, and test_randomize.  (I will fix these three issues in versions prior to 3.4 independent of this issue.)