Attached is a patch against trunk r76107 which fixes OpenKey to take
keyword arguments as the documentation states. There is also a small fix
to test_winreg - the third param to OpenKey on line 45 is the `res`
positional param, which should always be zero according to the doc. The
parameter passed is supposed to be the `sam` parameter, which is now
passed as a kwarg. There is no actual change to the test results.


While looking at this, I'm not sure I see the need for OpenKeyEx - it
just points to OpenKey. At the very least, it's parameter list in the
documentation is incorrect.