http: remove misleading warning

There are cases where the `'clientError'` event can be emitted multiple
times, even if the socket is correctly destroyed.

Fixes: https://github.com/nodejs/node/issues/51073
PR-URL: https://github.com/nodejs/node/pull/51204
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Paolo Insogna <paolo@cowtech.it>

test/parallel/test-http-server-multiple-client-error.js

@@ -0,0 +1,55 @@
+'use strict';
+const common = require('../common');
+
+// Test that the `'clientError'` event can be emitted multiple times even if the
+// socket is correctly destroyed and that no warning is raised.
+
+const assert = require('assert');
+const http = require('http');
+const net = require('net');
+
+process.on('warning', common.mustNotCall());
+
+function socketListener(socket) {
+  const firstByte = socket.read(1);
+  if (firstByte === null) {
+    socket.once('readable', () => {
+      socketListener(socket);
+    });
+    return;
+  }
+
+  socket.unshift(firstByte);
+  httpServer.emit('connection', socket);
+}
+
+const netServer = net.createServer(socketListener);
+const httpServer = http.createServer(common.mustNotCall());
+
+httpServer.once('clientError', common.mustCall((err, socket) => {
+  assert.strictEqual(err.code, 'HPE_INVALID_METHOD');
+  assert.strictEqual(err.rawPacket.toString(), 'Q');
+  socket.destroy();
+
+  httpServer.once('clientError', common.mustCall((err) => {
+    assert.strictEqual(err.code, 'HPE_INVALID_METHOD');
+    assert.strictEqual(
+      err.rawPacket.toString(),
+      'WE http://example.com HTTP/1.1\r\n\r\n'
+    );
+  }));
+}));
+
+netServer.listen(0, common.mustCall(() => {
+  const socket = net.createConnection(netServer.address().port);
+
+  socket.on('connect', common.mustCall(() => {
+    socket.end('QWE http://example.com HTTP/1.1\r\n\r\n');
+  }));
+
+  socket.on('close', () => {
+    netServer.close();
+  });
+
+  socket.resume();
+}));