owncloud: fix regex in nginx config

/cloud/index.php/apps/files/ajax/scan.php would not be parsed right because of two .php's

conf/nginx.conf

@@ -58,7 +58,7 @@ server {
 	 	}
 	}
 
-	location ~ ^(/cloud)(/.+\.php)(/.*)?$ {
+	location ~ ^(/cloud)(/[^/]+\.php)(/.*)?$ {
 		# note: ~ has precendence over a regular location block
 		include fastcgi_params;
 		fastcgi_param SCRIPT_FILENAME /usr/local/lib/owncloud/$2;