- implement set_display_mode method for svgalib display library.  Now it   handles text-to-vga transitions correctly for panics, the runtime config   menu (accessible by F12), and the Bochs debugger.
- implement set_display_mode method for svgalib display library.  Now it
  handles text-to-vga transitions correctly for panics, the runtime config
  menu (accessible by F12), and the Bochs debugger.

dbrashear/bochs,dbrashear/bochs,dbrashear/bochs,dariaphoebe/bochs,dariaphoebe/bochs,dbrashear/bochs,dariaphoebe/bochs,dbrashear/bochs,dariaphoebe/bochs,dariaphoebe/bochs