Scheme | Description
-----------------------|-------------------
-No scheme | Use service name "as is" to generate the filename - spaces are replaced with underscores `_` and non-alphanumeric characters are URL encoded.
-All lower-case | Generate lower-case filenames - spaces are replaced with underscores `_` and non-alphanumeric characters are URL encoded.
+No scheme | Use service name "as is" to generate the filename.
+All lower-case | Generate lower-case filenames.
Service name picons | Generate lower-case filenames using picon formatting.