nvlist: mixing Python boolean values and boolean_t in the same array is not supported

[avg-I]

The following code would raise an exception:

props = {"key": [boolean_t(False), True]}
nv_in = nvlist_in(props)

[avg-I]

Actually the same problem applies to integer C types and Python types that should be compatible.
E.g., the following fails:

props = {"key": [1, uint64_t(1)]}
nv_in = nvlist_in(props)