openssl: test and fix for forward proxy handling (non-tunneling).

- adding pytest test_10 cases for proxy httpd setup tests
- fixing openssl bug in https: proxy hostname verification that
  used the hostname of the request and not the proxy name.

Closes #10498

tests/tests-httpd/test_10_proxy.py

@@ -0,0 +1,70 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#***************************************************************************
+#                                  _   _ ____  _
+#  Project                     ___| | | |  _ \| |
+#                             / __| | | | |_) | |
+#                            | (__| |_| |  _ <| |___
+#                             \___|\___/|_| \_\_____|
+#
+# Copyright (C) 2008 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# This software is licensed as described in the file COPYING, which
+# you should have received as part of this distribution. The terms
+# are also available at https://curl.se/docs/copyright.html.
+#
+# You may opt to use, copy, modify, merge, publish, distribute and/or sell
+# copies of the Software, and permit persons to whom the Software is
+# furnished to do so, under the terms of the COPYING file.
+#
+# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+# KIND, either express or implied.
+#
+# SPDX-License-Identifier: curl
+#
+###########################################################################
+#
+import logging
+import os
+import pytest
+
+from testenv import Env, CurlClient
+
+
+log = logging.getLogger(__name__)
+
+
+@pytest.mark.skipif(condition=Env.setup_incomplete(),
+                    reason=f"missing: {Env.incomplete_reason()}")
+class TestProxy:
+
+    @pytest.fixture(autouse=True, scope='class')
+    def _class_scope(self, env, httpd):
+        push_dir = os.path.join(httpd.docs_dir, 'push')
+        if not os.path.exists(push_dir):
+            os.makedirs(push_dir)
+
+    # download via http: proxy (no tunnel)
+    def test_10_01_http_get(self, env: Env, httpd, repeat):
+        curl = CurlClient(env=env)
+        url = f'http://localhost:{env.http_port}/data.json'
+        r = curl.http_download(urls=[url], alpn_proto='http/1.1', with_stats=True,
+                               extra_args=[
+                                 '--proxy', f'http://{env.proxy_domain}:{env.http_port}/',
+                                 '--resolve', f'{env.proxy_domain}:{env.http_port}:127.0.0.1',
+                               ])
+        assert r.exit_code == 0
+        r.check_stats(count=1, exp_status=200)
+
+    # download via https: proxy (no tunnel)
+    def test_10_02_http_get(self, env: Env, httpd, repeat):
+        curl = CurlClient(env=env)
+        url = f'http://localhost:{env.http_port}/data.json'
+        r = curl.http_download(urls=[url], alpn_proto='http/1.1', with_stats=True,
+                               extra_args=[
+                                 '--proxy', f'https://{env.proxy_domain}:{env.https_port}/',
+                                 '--resolve', f'{env.proxy_domain}:{env.https_port}:127.0.0.1',
+                                 '--proxy-cacert', env.ca.cert_file,
+                               ])
+        assert r.exit_code == 0
+        r.check_stats(count=1, exp_status=200)