bpo-39567: Document audit for os.walk, os.fwalk, Path.glob and Path.rglob. (GH-18499)

diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index af02a37..c9d6fb2 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -3053,6 +3053,8 @@
           for name in dirs:
               os.rmdir(os.path.join(root, name))
 
+   .. audit-event:: os.walk top,topdown,onerror,followlinks os.walk
+
    .. versionchanged:: 3.5
       This function now calls :func:`os.scandir` instead of :func:`os.listdir`,
       making it faster by reducing the number of calls to :func:`os.stat`.
@@ -3112,6 +3114,8 @@
           for name in dirs:
               os.rmdir(name, dir_fd=rootfd)
 
+   .. audit-event:: os.fwalk top,topdown,onerror,follow_symlinks,dir_fd os.fwalk
+
    .. availability:: Unix.
 
    .. versionadded:: 3.3