githubFork/roundcubemail.git

			@@ -326,6 +326,11 @@
			// 3 - one identity with possibility to edit all params but not email address
			$rcmail_config['identities_level'] = 0;

			// Mimetypes supported by the browser.
			// attachments of these types will open in a preview window
			// either a comma-separated list or an array: 'text/plain,text/html,text/xml,image/jpeg,image/gif,image/png,application/pdf'
			$rcmail_config['client_mimetypes'] = null; # null == default

			// mime magic database
			$rcmail_config['mime_magic'] = '/usr/share/misc/magic';