framework: Implement fetch-url-recursive-list and fetch-urlall-recursive-list

[0mp]

Summary

The recursive variants of fetch-url-list and fetch-urlall-list provide
a stable interface to a list of all the to-be-accessed URLs. That is
quite handy, e.g., when a list like that is necessary to implement
security policies.

Sponsored by: Klara Inc.

[0mp]

Thanks!