Add class variable allow_reuse_address in TCPServer -- if nonzero, the

server_bind() method calls setsockopt(SOL_SOCKET, SO_REUSEADDR, 1).

Lib/SocketServer.py

@@ -141,6 +141,7 @@ class TCPServer:
     - address_family
     - socket_type
     - request_queue_size (only for stream sockets)
+    - reuse_address
 
     Instance variables:
 
@@ -156,6 +157,8 @@ class TCPServer:
 
     request_queue_size = 5
 
+    allow_reuse_address = 0
+
     def __init__(self, server_address, RequestHandlerClass):
         """Constructor.  May be extended, do not override."""
         self.server_address = server_address
@@ -171,6 +174,8 @@ class TCPServer:
         May be overridden.
 
         """
+        if self.allow_reuse_address:
+            self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
         self.socket.bind(self.server_address)
 
     def server_activate(self):