issue25931: document that socketserver.Forking* are unavailable on platforms
that support os.fork.
diff --git a/Doc/library/socketserver.rst b/Doc/library/socketserver.rst
index af2e253..a7c3e3e 100644
--- a/Doc/library/socketserver.rst
+++ b/Doc/library/socketserver.rst
@@ -116,6 +116,9 @@
:class:`UDPServer`. Setting the various attributes also changes the
behavior of the underlying server mechanism.
+ :class:`ForkingMixIn` and the Forking classes mentioned below are
+ only available on POSIX platforms that support :func:`~os.fork`.
+
.. class:: ForkingTCPServer
ForkingUDPServer
@@ -612,3 +615,4 @@
The :class:`ForkingMixIn` class is used in the same way, except that the server
will spawn a new process for each request.
+Available only on POSIX platforms that support :func:`~os.fork`.