Initial sioconfig migration work

src/configuration/ioconfig.js

@@ -0,0 +1,23 @@
+export default class IOConfiguration {
+    constructor(config) {
+        this.config = config;
+    }
+
+    getSocketURL() {
+        return this.config.urls[0];
+    }
+}
+
+IOConfiguration.fromOldConfig = function (oldConfig) {
+    const config = {
+        urls: []
+    };
+
+    ['ipv4-ssl', 'ipv4-nossl', 'ipv6-ssl', 'ipv6-nossl'].forEach(key => {
+        if (oldConfig.get('io.' + key)) {
+            config.urls.push(oldConfig.get('io.' + key));
+        }
+    });
+
+    return new IOConfiguration(config);
+};