Merge pull request #6663 from owncloud/fix_empty_mimetypes

remove duplicate exe mimetype, add correct msi mimetype

lib/private/mimetypes.list.php

@@ -66,6 +66,7 @@ return array(
 	'xlsx'=>'application/msexcel',
 	'php'=>'application/x-php',
 	'exe'=>'application/x-ms-dos-executable',
+	'msi'=>'application/x-msi',
 	'pl'=>'application/x-pearl',
 	'py'=>'application/x-python',
 	'blend'=>'application/x-blender',
@@ -97,8 +98,6 @@ return array(
 	'ai' => 'application/illustrator',
 	'epub' => 'application/epub+zip',
 	'mobi' => 'application/x-mobipocket-ebook',
-	'exe' => 'application',
-	'msi' => 'application',
 	'md' => 'text/markdown',
 	'markdown' => 'text/markdown',
 	'mdown' => 'text/markdown',