gh-103673: Add missing ForkingUnixStreamServer and ForkingUnixDatagramServer socketservers

Doc/library/socketserver.rst

@@ -140,6 +140,10 @@ server is the address family.
            ForkingUDPServer
            ThreadingTCPServer
            ThreadingUDPServer
+           ForkingUnixStreamServer
+           ForkingUnixDatagramServer
+           ThreadingUnixStreamServer
+           ThreadingUnixDatagramServer
 
    These classes are pre-defined using the mix-in classes.
 

Lib/socketserver.py

@@ -141,6 +141,8 @@ class will essentially render the service "deaf" while one request is
     __all__.extend(["UnixStreamServer","UnixDatagramServer",
                     "ThreadingUnixStreamServer",
                     "ThreadingUnixDatagramServer"])
+    if hasattr(os, "fork"):
+        __all__.extend(["ForkingUnixStreamServer","ForkingUnixDatagramServer"])
 
 # poll/select have the advantage of not requiring any extra file descriptor,
 # contrarily to epoll/kqueue (also, they require a single syscall).
@@ -727,6 +729,11 @@ class ThreadingUnixStreamServer(ThreadingMixIn, UnixStreamServer): pass
 
     class ThreadingUnixDatagramServer(ThreadingMixIn, UnixDatagramServer): pass
 
+    if hasattr(os, "fork"):
+        class ForkingUnixStreamServer(ForkingMixIn, UnixStreamServer): pass
+
+        class ForkingUnixDatagramServer(ForkingMixIn, UnixDatagramServer): pass
+
 class BaseRequestHandler:
 
     """Base class for request handler classes.

Misc/ACKS

@@ -160,6 +160,7 @@ Brice Berna
 Olivier Bernard
 Vivien Bernet-Rollande
 Maxwell Bernstein
+Jay Berry
 Eric Beser
 Steven Bethard
 Stephen Bevan

Misc/NEWS.d/next/Library/2023-04-22-02-41-06.gh-issue-103673.oE7S_k.rst

@@ -0,0 +1,2 @@
+socketserver: Add missing ForkingUnixStreamServer and
+ForkingUnixDatagramServer servers