Log Message:
Enable XFree86-DGA mouse and keyboard inputs. Bump revision.

The configure script determines the availability of libXxf86dga only by the \ 
existence of X11/extensions/xf86dga.h. This leads to a linkage error on \ 
platforms (e.g. Darwin) where the header in question can be found in the system \ 
default path but the corresponding library is installed elsewhere. The problem \ 
goes away if we had the library buildlinked, and I see no reason for not \ 
enabling DGA input anyway.