Revert "Added IPv6 support (#73)"

This reverts commit 9d9a3639e1.

docker/docker-py3-kms-minimal/Dockerfile

@@ -2,7 +2,7 @@
 
 FROM alpine:3.8
 
-ENV IP		::
+ENV IP		0.0.0.0
 ENV PORT		1688
 ENV EPID		""
 ENV LCID		1033

docker/docker-py3-kms/Dockerfile

@@ -9,8 +9,8 @@ FROM alpine:3.8
 
 # EN: IP-address
 # RU: IP-адрес
-ENV IP		::
-# The IP address to listen on. The default is "::" (all interfaces).
+ENV IP		0.0.0.0
+# The IP address to listen on. The default is "0.0.0.0" (all interfaces).
 
 # EN: TCP-port
 # RU: TCP-порт
@@ -115,4 +115,4 @@ WORKDIR /home/py-kms
 EXPOSE ${PORT}/tcp
 
 # Entry point
-ENTRYPOINT ["/usr/bin/start.sh"]
+ENTRYPOINT ["/usr/bin/start.sh"]

py-kms/pykms_Server.py

@@ -37,7 +37,6 @@ class KeyServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
         allow_reuse_address = True
 
         def __init__(self, server_address, RequestHandlerClass):
-                self.address_family = socket.AF_INET6 # This call make sure the server creates an IPv6 socket and NOT an IPv4 by default
                 socketserver.TCPServer.__init__(self, server_address, RequestHandlerClass)
                 self.__shutdown_request = False
                 self.r_service, self.w_service = socket.socketpair()