Is there a way to add a prefix or suffix that gets added to the query string before it gets passed to the engine? #6157

Hi!

I'd like to add several engines that all use the same Yacy instance, but add collection or site names to the query without it being typed by the user (eg: site:, or collection:<collection_name>). Use case is I'd like to reuse the same Yacy instance for different categories, but specify a different collection or site for each one.

Just wanted to ask if there an elegant way to do this without configuring a custom xpath engine, or modifying the source code?