don't send requests to specified list of IP CIDRs

this can most definitely be improved but this is a decent attempt.
the only annoying this is i couldn't just use a Vec<IPAddress> which
would have significantly simplified all of this, but serde can't
deserialise it on the config side i guess.

i may find a better way to do this in the future, but this should cover
most areas anyways.

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/service/globals/mod.rs

@@ -427,6 +427,10 @@ impl Service<'_> {
         &self.config.prevent_media_downloads_from
     }
 
+    pub fn ip_range_denylist(&self) -> &[String] {
+        &self.config.ip_range_denylist
+    }
+
     pub fn supported_room_versions(&self) -> Vec<RoomVersionId> {
         let mut room_versions: Vec<RoomVersionId> = vec![];
         room_versions.extend(self.stable_room_versions.clone());