[url] tag does not work when URL does not have a schema prefixed #40
Description
When using the DefaultCodeDefinitionSet the following does not work: [url=www.google.com]www.google.com[/url]. This is not unreasonable since it is technically not a valid URL, however most users will expect this to work. It may be fruitful to include a mechanism where it can default to the http:// schema when none is found.
This issue has been raised on behalf of https://github.com/r04r/Minichan/issues/21.