add proxy handler "has" for "http2.Http2ServerResponse.socket" and "http2.Http2ServerRequest.socket"

lib/internal/http2/compat.js

@@ -188,6 +188,11 @@ function resumeStream(stream) {
 }
 
 const proxySocketHandler = {
+  has(stream, prop) {
+    const ref = stream.session !== undefined ? stream.session[kSocket] : stream;
+    return (prop in stream) || (prop in ref);
+  },
+
   get(stream, prop) {
     switch (prop) {
       case 'on':

test/parallel/test-http2-socket-proxy-handler-for-has.js

@@ -0,0 +1,39 @@
+'use strict';
+const common = require('../common');
+if (!common.hasCrypto) {
+  common.skip('missing crypto');
+}
+
+const fixtures = require('../common/fixtures');
+const assert = require('assert');
+const http2 = require('http2');
+
+const serverOptions = {
+  key: fixtures.readKey('agent1-key.pem'),
+  cert: fixtures.readKey('agent1-cert.pem')
+};
+const server = http2.createSecureServer(serverOptions, common.mustCall(
+  (req, res) => {
+    const request = req;
+    assert.strictEqual(request.socket.encrypted, true);
+    assert.ok('encrypted' in request.socket);
+    res.end();
+  }
+));
+server.listen(common.mustCall(() => {
+  const port = server.address().port;
+  const client = http2.connect('https://localhost:' + port, {
+    ca: fixtures.readKey('agent1-cert.pem'),
+    rejectUnauthorized: false
+  });
+  const req = client.request({});
+  req.on('response', common.mustCall((headers, flags) => {
+    console.log(headers);
+    server.close(common.mustCall(() => {
+    }));
+  }));
+  req.on('end', common.mustCall(() => {
+    client.close();
+  }));
+  req.end();
+}));