Replace patchwork/utf8 with symfony-polyfill-*

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

3rdparty @ 86573beb

-Subproject commit 875ee27505a280f58a893b16976fe36572fd82c4
+Subproject commit 86573beb84cf3b62b6d01ee377225df83b7d2453

lib/base.php

@@ -629,8 +629,7 @@ class OC {
 		self::handleAuthHeaders();
 		self::registerAutoloaderCache();
 
-		// initialize intl fallback is necessary
-		\Patchwork\Utf8\Bootup::initIntl();
+		// initialize intl fallback if necessary
 		OC_Util::isSetLocaleWorking();
 
 		if (!defined('PHPUNIT_RUN')) {

lib/private/legacy/OC_Util.php

@@ -1293,7 +1293,13 @@ class OC_Util {
 	 * @return bool
 	 */
 	public static function isSetLocaleWorking() {
-		\Patchwork\Utf8\Bootup::initLocale();
+		if ('' === basename('§')) {
+			// Borrowed from \Patchwork\Utf8\Bootup::initLocale
+			setlocale(LC_ALL, 'C.UTF-8', 'C');
+			setlocale(LC_CTYPE, 'en_US.UTF-8', 'fr_FR.UTF-8', 'es_ES.UTF-8', 'de_DE.UTF-8', 'ru_RU.UTF-8', 'pt_BR.UTF-8', 'it_IT.UTF-8', 'ja_JP.UTF-8', 'zh_CN.UTF-8', '0');
+		}
+
+		// Check again
 		if ('' === basename('§')) {
 			return false;
 		}