Maps does not load on HTTPS pages

[GoogleCodeExporter]

Maps do not load on pages served via HTTPS. The Google Maps javascript file is 
always loaded via http://, even if the page itself is loaded via https. This 
results in browsers blocking the unsecure content, or raising a warning about 
mixed content.

Loading the maps javascript without an explicit protocol resolves the issue

<script type='text/javascript' 
src='//maps.google.com/maps/api/js?sensor=false&#038;language=nl&#038;ver=4.0'><
/script>

Or always load via HTTPS. Loading HTTPS on a non-secure site will not lead to 
problems.

Tested on:
Wordpress 4.0
Geo-mashup 1.8.1
Firefox 34 (beta) / Chrome 39

Original issue reported on code.google.com by danielvi...@gmail.com on 12 Nov 2014 at 8:03