Now that it's trying to guess whether the type is markdown based on
the file extension, there needs to be a way to override it. For example
it might be arranged that directory listings will be generated in
markdown format instead of HTML; then when loading a source URL that
is a directory, the application may override the type. The type for
the single-argument setSource(url) is UnknownResource to preserve
the existing behavior, but the user can override the guessing by
setting a specific type.
Change-Id: Id111efd24de7d8fd18c47b16a2d58f5b09d77891
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>
b149f5d77a