MAutoStencilFlip On/Off ; Auto X&Y Stencil-Flip for Bitmaps

Sets Mildreds autostencilYFlip and autostencilXFlip On or Off. If On, any X
(horizontal) or Y (verticle) flip operations performed on a chunky Bitmap will
also be performed on the Bitmap's stencil. This command overrides any previous
seperate calls to MAutoStencilXFlip and MAutoStencilYFlip.