Allows loading an already opened driver settings file (by FD).
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3530 a95241bf-73f2-0310-859d-f6bbb57e9c96
license stuff in it :-). Some cleanup on the other headers. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@638 a95241bf-73f2-0310-859d-f6bbb57e9c96