Rune, those lines are used to display images, not save them so it doesn't matter if you change domain, SSL etc later.

Sorry, but you are actually wrong Denis. Guess you misunderstood me here, so let's try to clear it up.

They are used to generate the link to the image inserted by the filemanager into the code/database, e.g. when inserting images in product descriptions, modules and information pages etc.
Please test it and you will notice they are inserted with full URL, and after adding the mod -> relative URL and still working...

PS! Take any OC and Arastta database and search for:

src=& quot ;http

(should be without the spaces, but forum transforms it then)