'int32_t's instead, so that this code is usable on the alpha.
Integrate patches from der Mouse (8-bit cleanliness, FULLSCREEN option, SMALLFONT option). The (MD) caller of rcons_init() is now responsible for initialising `rc_font'.
sparc device dependencies have been removed, as well as all references to `struct fbdevice's. Clients need to #include <dev/rcons/rcons.h>.