bpo-36763: Add PyConfig_SetWideStringList() (GH-14444)

(cherry picked from commit 36242fd871d0f0977e720d4fae5700774bd8c09a)

Co-authored-by: Victor Stinner <vstinner@redhat.com>
diff --git a/Include/cpython/initconfig.h b/Include/cpython/initconfig.h
index 297fbf7..bd07a48 100644
--- a/Include/cpython/initconfig.h
+++ b/Include/cpython/initconfig.h
@@ -422,6 +422,9 @@
 PyAPI_FUNC(PyStatus) PyConfig_SetArgv(PyConfig *config,
     Py_ssize_t argc,
     wchar_t * const *argv);
+PyAPI_FUNC(PyStatus) PyConfig_SetWideStringList(PyConfig *config,
+    PyWideStringList *list,
+    Py_ssize_t length, wchar_t **items);
 
 #ifdef __cplusplus
 }