The -Q command-line option has been removed in Python 3 but there are some leftovers.  Attached patch removes them; tests pass; please review.

I think 3.1 should be fixed too, since no sane program should use those leftovers.

I removed the now-pointless tests in test_cmd_line.  They were not failing; this may be a bug in verify_valid_flag, out of scope for this report.

While I was editing the table used to document sys.flags, I added some link-generating markup (to the respective option doc) and made the table markup easier to read and edit.  I can make those changes in another commit if you prefer it.