CLONE -Scalable Vector Graphics (SVG) files in Moodle are not correctly displayed in many Browsers

Applies to Web browsers (Firefox, Opera) that natively display SVG and require correct MIME type to be served from Moodle.
Internet Explorer + Adobe SVG Plugin view does not have a problem as it renders SVG base on the .svg extension alone.

Problem can be simply resolved by adding the following lines to function get_mimetypes_array() in /lib/filelib.php

i.e.

'svg' => array ('type'=>'image/svg+xml', 'icon'=>'image.gif'),
'svgz' => array ('type'=>'image/svg+xml', 'icon'=>'image.gif'),