Get rid of dict.has_key(). Boy this has a lot of repercussions!

Not all code has been fixed yet; this is just a checkpoint...
The C API still has PyDict_HasKey() and _HasKeyString(); not sure
if I want to change those just yet.

Lib/DocXMLRPCServer.py

@@ -174,7 +174,7 @@ class XMLRPCDocGenerator:
         methods = {}
 
         for method_name in self.system_listMethods():
-            if self.funcs.has_key(method_name):
+            if method_name in self.funcs:
                 method = self.funcs[method_name]
             elif self.instance is not None:
                 method_info = [None, None] # argspec, documentation