http: do not override user-provided options object

PR-URL: https://github.com/nodejs/node/pull/33633
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Paolo Insogna <paolo@cowtech.it>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-http-client-input-function.js

@@ -0,0 +1,29 @@
+'use strict';
+
+const common = require('../common');
+const http = require('http');
+const assert = require('assert');
+
+{
+  const server = http.createServer(common.mustCall((req, res) => {
+    res.writeHead(200);
+    res.end('hello world');
+  })).listen(0, '127.0.0.1');
+
+  server.on('listening', common.mustCall(() => {
+    const req = new http.ClientRequest(server.address(), common.mustCall((response) => {
+      let body = '';
+      response.setEncoding('utf8');
+      response.on('data', (chunk) => {
+        body += chunk;
+      });
+
+      response.on('end', common.mustCall(() => {
+        assert.strictEqual(body, 'hello world');
+        server.close();
+      }));
+    }));
+
+    req.end();
+  }));
+}