Add simple Unix socket example by Piet van Oostrum.
diff --git a/Demo/sockets/unixserver.py b/Demo/sockets/unixserver.py
new file mode 100644
index 0000000..3d6f3c3
--- /dev/null
+++ b/Demo/sockets/unixserver.py
@@ -0,0 +1,14 @@
+# Echo server program using Unix sockets (handles one connection only)
+from socket import *
+FILE = 'blabla'
+s = socket(AF_UNIX, SOCK_STREAM)
+s.bind(FILE)
+print 'Sock name is: ['+s.getsockname()+']'
+s.listen(1)
+conn, addr = s.accept()
+print 'Connected by', addr
+while 1:
+ data = conn.recv(1024)
+ if not data: break
+ conn.send(data)
+conn.close()