8011885: Switch to Joni as default Regexp engine Reviewed-by: lagergren, sundar

8011884: Regexp literals are compiled twice Reviewed-by: lagergren, sundar

8011980: Allow NUL character in character class Reviewed-by: sundar, lagergren

8011974: Comparator function returning negative and positive Infinity does not work as expected with Array.prototype.sort Reviewed-by: hannesw, lagergren

8011960: [2,1].sort(null) should throw TypeError Reviewed-by: hannesw, lagergren

8011756: Wrong characters supported in RegExp \c escape Reviewed-by: lagergren, attila

8011749: Bugs with empty character class handling Reviewed-by: lagergren, attila