http: don't write error to socket

The state of the connection is unknown at this point and
writing to it can corrupt client state before it is aware
of an error.

PR-URL: https://github.com/nodejs/node/pull/34465
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-http-header-badrequest.js

@@ -0,0 +1,31 @@
+'use strict';
+const { mustCall } = require('../common');
+const assert = require('assert');
+const { createServer } = require('http');
+const { createConnection } = require('net');
+
+const server = createServer();
+
+server.on('request', mustCall((req, res) => {
+  res.write('asd', () => {
+    res.socket.emit('error', new Error('kaboom'));
+  });
+}));
+
+server.listen(0, mustCall(() => {
+  const c = createConnection(server.address().port);
+  let received = '';
+
+  c.on('connect', mustCall(() => {
+    c.write('GET /blah HTTP/1.1\r\n\r\n');
+  }));
+  c.on('data', mustCall((data) => {
+    received += data.toString();
+  }));
+  c.on('end', mustCall(() => {
+    // Should not include anything else after asd.
+    assert.strictEqual(received.indexOf('asd\r\n'), received.length - 5);
+    c.end();
+  }));
+  c.on('close', mustCall(() => server.close()));
+}));