some systems use en_US.UTF8 instead of en_US.UTF-8

lib/base.php

@@ -346,7 +346,7 @@ class OC {
 	public static function init() {
 		// register autoloader
 		spl_autoload_register(array('OC', 'autoload'));
-		setlocale(LC_ALL, 'en_US.UTF-8');
+		OC_Util::issetlocaleworking();
 
 		// set some stuff
 		//ob_start();
@@ -498,7 +498,7 @@ class OC {
 
 		// write error into log if locale can't be set
 		if (OC_Util::issetlocaleworking() == false) {
-			OC_Log::write('core', 'setting locale to en_US.UTF-8 failed. Support is probably not installed on your system', OC_Log::ERROR);
+			OC_Log::write('core', 'setting locale to en_US.UTF-8/en_US.UTF8 failed. Support is probably not installed on your system', OC_Log::ERROR);
 		}
 		if (OC_Config::getValue('installed', false)) {
 			if (OC_Appconfig::getValue('core', 'backgroundjobs_mode', 'ajax') == 'ajax') {

lib/util.php

@@ -526,12 +526,11 @@ class OC_Util {
 			return true;
 		}
 
-		$result=setlocale(LC_ALL, 'en_US.UTF-8');
-		if($result==false) {
-			return(false);
-		}else{
-			return(true);
-		}
+		$result = setlocale(LC_ALL, 'en_US.UTF-8', 'en_US.UTF8');
+		if($result == false) {
+			return false;
+        }
+        return true;
 	}
 
 	/**

settings/templates/admin.php

@@ -42,7 +42,7 @@ if (!$_['islocaleworking']) {
 	<legend><strong><?php echo $l->t('Locale not working');?></strong></legend>
 
 		<span class="connectionwarning">
-		<?php echo $l->t('This ownCloud server can\'t set system locale to "en_US.UTF-8". This means that there might be problems with certain characters in file names. We strongly suggest to install the required packages on your system to support en_US.UTF-8.'); ?>
+		<?php echo $l->t('This ownCloud server can\'t set system locale to "en_US.UTF-8"/"en_US.UTF8". This means that there might be problems with certain characters in file names. We strongly suggest to install the required packages on your system to support en_US.UTF-8/en_US.UTF8.'); ?>
 	</span>
 
 </fieldset>