cubicweb #3670210 Allow to override use_cwuri_as_url in configuration of a datafeed source [validation pending]

This is currently hardcoded by the source type, though it actually depends on the parser (or even of the site administrator's wish?). Introduce a use-cwuri-as-url option that ease per source configuration of this, keeping default to the source class attribute.

prioritynormal
typeenhancement
done in3.20.0
load0.100
load left0.000
closed by#4a118bfd6ab4 [datafeed] Allow to override use_cwuri_as_url in configuration of a datafeed source
patch[datafeed] Allow to override use_cwuri_as_url in configuration of a datafeed source [applied]