Make the cache_function key a bit more descriptive

Signed-off-by: Dan McGee <dan@archlinux.org>

main/utils.py

@@ -23,6 +23,7 @@ def inner_func(*args, **kwargs):
             raw = [func.__name__, func.__module__, args, kwargs]
             pickled = pickle.dumps(raw, protocol=pickle.HIGHEST_PROTOCOL)
             key = md5_constructor(pickled).hexdigest()
+            key = 'cache_function.' + func.__name__ + '.' + key
             value = cache.get(key)
             if value is not None:
                 return value