Removing direct graphics access from DGA

[Simon Thum]

Keith Packard wrote:
> It's important to note here that we're returning a random internal X
> server address space value to applications and encouraging them to mmap
> that part of CPU physical address space and write pixels there. Clearly,
> this code hasn't ever been used by an application as it could never have
> worked.
FWIW, the GGI (ggi-project.org) has had a backend for X/DGA, and it was
even faster than non-DGA on XFree 3.6 or so. So something worked sometime.

Burn, ***, burn.
 - Bloodhound gang