Added config_network to functions.sh

lib/functions.sh

@@ -1698,3 +1698,16 @@ It's <b>your</b> computer. Let's make it work for you!
 </html>
 EOF
 }
+config_network() {
+  echo -ne "\n* Configuring federated network.."
+  spin &
+  SPINPID=$!
+
+  if [ ! `docker network ls -q --filter name=federated` ]; then
+    docker network create --subnet 172.99.0.0/16 federated &> /dev/null
+    [ $? -ne 0 ] && fail "Couldn't run docker network create"
+  fi
+
+  echo -ne "done."
+  kill -9 $SPINPID &> /dev/null
+}