* Fix debian/rules to not be confused by ~/.quiltrc or QUILT_PATCHES (as in #369920).
* Display which patches are applied and removed instead of just the first one (for #428090).
* 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.