http: fixed socket.setEncoding fatal error

Applied updates from previous pull-requests to disallow
socket.setEncoding before a http connection is parsed.
Wrapped `socket.setEncoding` to throw an error.
This previously resulted in a fatal error.

PR-URL: https://github.com/nodejs/node/pull/33405
Fixes: https://github.com/nodejs/node/issues/18118
Refs: https://github.com/nodejs/node/pull/18178
Refs: https://github.com/nodejs/node/pull/19344
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

test/parallel/test-http-socket-encoding-error.js

@@ -0,0 +1,29 @@
+'use strict';
+
+const common = require('../common');
+const assert = require('assert');
+const http = require('http');
+
+const server = http.createServer().listen(0, connectToServer);
+
+server.on('connection', common.mustCall((socket) => {
+  assert.throws(
+    () => {
+      socket.setEncoding('');
+    },
+    {
+      code: 'ERR_HTTP_SOCKET_ENCODING',
+      name: 'Error',
+      message: 'Changing the socket encoding is not ' +
+        'allowed per RFC7230 Section 3.'
+    }
+  );
+
+  socket.end();
+}));
+
+function connectToServer() {
+  const client = new http.Agent().createConnection(this.address().port, () => {
+    client.end();
+  }).on('end', () => server.close());
+}