bug #20862 Allow simple-phpunit to be used with an HTTP proxy (Cydonia7)

This PR was merged into the 3.2 branch.

Discussion
----------

Allow simple-phpunit to be used with an HTTP proxy

| Q             | A
| ------------- | ---
| Branch?       | 3.2
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | no

The title pretty much sums it up. I had to use the script behind a proxy and it did not work well so here is a little fix to take the `http_proxy` environment variable into account when downloading with fopen.

I don't think there needs to be a doc PR associated since this feature should be transparent for the end-user.

Commits
-------

921b646 Allow simple-phpunit to be used with an HTTP proxy

src/Symfony/Bridge/PhpUnit/bin/simple-phpunit

@@ -37,7 +37,7 @@ if (!file_exists("$PHPUNIT_DIR/phpunit-$PHPUNIT_VERSION/phpunit") || md5_file(__
     if (file_exists("phpunit-$PHPUNIT_VERSION")) {
         passthru(sprintf('\\' === DIRECTORY_SEPARATOR ? '(del /S /F /Q %s & rmdir %1$s) >nul': 'rm -rf %s', "phpunit-$PHPUNIT_VERSION"));
     }
-    if (extension_loaded('openssl') && ini_get('allow_url_fopen')) {
+    if (extension_loaded('openssl') && ini_get('allow_url_fopen') && !isset($_SERVER['http_proxy']) && !isset($_SERVER['https_proxy'])) {
         stream_copy_to_stream(fopen("https://github.com/sebastianbergmann/phpunit/archive/$PHPUNIT_VERSION.zip", 'rb'), fopen("$PHPUNIT_VERSION.zip", 'wb'));
     } else {
         @unlink("$PHPUNIT_VERSION.zip");