* Handler for the Gimp's native file format (XCF)
*
* Overview:
- * http://en.wikipedia.org/wiki/XCF_(file_format)
+ * https://en.wikipedia.org/wiki/XCF_(file_format)
* Specification in Gnome repository:
* http://svn.gnome.org/viewvc/gimp/trunk/devel-docs/xcf.txt?view=markup
*