Hotlink protection added

I’ve had a couple of bandwidth losing moments this week; and rather than worry about it I’ve moved to prevent hotlinking of images from from my blog.  The only sites that are allowed to hotlink images from here are  my other blog, the rest of the world will see an anti-hotlinking image in place of the image they have hotlinked.

Oh well.  It’s not friendly but I’d rather have more control as to where the images I host locally are presented.