Make Cloudmade maps use HTTPS

[dandv]

Similar problem as in #700 - on this map, I get

The page displayed insecure content from http://c.tile.cloudmade.com/d089e834e3a7405dae259122d0f533d7/71401/256/10/162/396.png

That image is accessible through HTTPS, but the browser issues a certificate warning. Looks like a non-trivial case and unfortunately I don't have much time to debug, so I thought I'd help by raising the issue.

There's also a separate ssl_tiles subdomain, but unclear if there are [a,b,c] servers for parallel downloads - http://blog.cloudmade.com/2013/06/21/ssl-available-on-all-cloudmade-services/

[mprins]

the certificate is valid for *.cloudfront.net and is not valid for cloudmade.com, Cloudmade should fix their infrastructure by presenting a valid certificate for their domain, this is not OpenLayers specific.

Next, you may want to update the urls in your map, to use https or load tiles based on the page protocol.

[soulseekah]

Use ssl_tiles.cloudmade.com instead: http://blog.cloudmade.com/2013/06/21/ssl-available-on-all-cloudmade-services/