XKCD-style password generator that picks five random words from dictionary.
See https://xkcd.com/936/ for rationale. Uses words from https://github.com/first20hours/google-10000-english
Usage:
$ make correct-horse-battery-staple
c++ correct-horse-battery-staple.cpp -o correct-horse-battery-staple
$ ./correct-horse-battery-staple
thee-sell-nudity-coat-forge
$ ./correct-horse-battery-staple 3
club-saving-leon-pros-reported
inns-outlook-herald-handed-coming
navigate-seeds-charleston-pack-financing