* Have the drivers use the file serverminver instead of serverabiver in order
to generate the versioned dependency on the server. This is clearer
naming.
* Use serverabiver to actually store the server's video ABI version. This
is used to generate the Provides: line for drivers so the server can
depend on them properly. This goes in to the substvar
xviddriver:Provides.
David Nusinow
Julien Cristau