Additional FTL configuration option

during the end stage of the gravity run, following message(s) may appear:

[2021-07-10 09:13:00.567 7474M] domain_in_list("userlocation.googleapis.com", 0x73715f80, gravity): Database is busy, assuming domain is NOT on list

request: option to allow (current default) or block the requests (preferred), this to, for example, prevent communicating the device location to google.