feat(PortProxy): Add feature to preserve original client IP through chained proxies

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartproxy',
-  version: '3.5.0',
+  version: '3.6.0',
   description: 'a proxy for handling high workloads of proxying'
 }

ts/smartproxy.portproxy.ts

@@ -123,9 +123,11 @@ export class PortProxy {
       const domainConfig = serverName ? findMatchingDomain(serverName) : undefined;
       const targetHost = domainConfig?.targetIP || this.settings.toHost!;
       
+      // Create connection with IP binding to preserve original client IP
       const to = plugins.net.createConnection({
         host: targetHost,
         port: this.settings.toPort,
+        localAddress: remoteIP.replace('::ffff:', ''), // Remove IPv6 mapping if present
       });
       console.log(`Connection established: ${remoteIP} -> ${targetHost}:${this.settings.toPort}${serverName ? ` (SNI: ${serverName})` : ''}`);
       from.setTimeout(120000);