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

diff --git a/Doc/c-api/init_config.rst b/Doc/c-api/init_config.rst
index 0d94e6b..d2c1f9a 100644
--- a/Doc/c-api/init_config.rst
+++ b/Doc/c-api/init_config.rst
@@ -25,6 +25,7 @@
 * :c:func:`PyConfig_SetBytesArgv`
 * :c:func:`PyConfig_SetBytesString`
 * :c:func:`PyConfig_SetString`
+* :c:func:`PyConfig_SetWideStringList`
 * :c:func:`PyPreConfig_InitIsolatedConfig`
 * :c:func:`PyPreConfig_InitPythonConfig`
 * :c:func:`PyStatus_Error`
@@ -368,6 +369,12 @@
 
       Preinitialize Python if needed.
 
+   .. c:function:: PyStatus PyConfig_SetWideStringList(PyConfig *config, PyWideStringList *list, Py_ssize_t length, wchar_t **items)
+
+      Set the list of wide strings *list* to *length* and *items*.
+
+      Preinitialize Python if needed.
+
    .. c:function:: PyStatus PyConfig_Read(PyConfig *config)
 
       Read all Python configuration.