x11/xlockmore: Update to 5.84

5.84
  New automata mode paterson added from same article as spirolateral.
    Initial investigation by Paterson, Conway, and Beeler.

5.83
  spirolateral mode added thanks to Martin Gardner's book "Knotted
    Donuts" chapter on "Worm Paths".  This generates simple and
    complex spirolaterals.
  Fixing -delay issue on VMS for x86-64.
  Removed a warning in snprintf for Windows.
