media/cbsnews.lua: Rewrite ident function
media/cbsnews.lua: Rewrite ident function

Rewrite the `ident' function for the 0.9+ series.
* Remove any now obsolete code from the function
* Add CBSNews.can_parse_url

legatvs/libquvi-scripts,legatvs/libquvi-scripts,alech/libquvi-scripts,alech/libquvi-scripts