Rename PyUnicode_strdup() to PyUnicode_AsUnicodeCopy()

Include/unicodeobject.h

@@ -1607,7 +1607,7 @@ PyAPI_FUNC(Py_UNICODE*) Py_UNICODE_strrchr(
    and raise a MemoryError exception on memory allocation failure, otherwise
    return a new allocated buffer (use PyMem_Free() to free the buffer). */
 
-PyAPI_FUNC(Py_UNICODE*) PyUnicode_strdup(
+PyAPI_FUNC(Py_UNICODE*) PyUnicode_AsUnicodeCopy(
     PyObject *unicode
     );
 

Objects/unicodeobject.c

@@ -10015,7 +10015,7 @@ Py_UNICODE_strrchr(const Py_UNICODE *s, Py_UNICODE c)
 }
 
 Py_UNICODE*
-PyUnicode_strdup(PyObject *object)
+PyUnicode_AsUnicodeCopy(PyObject *object)
 {
     PyUnicodeObject *unicode = (PyUnicodeObject *)object;
     Py_UNICODE *copy;