Change range of leader scheduler to match current broadcasts (#1920)

src/db_window.rs

@@ -280,6 +280,9 @@ pub fn process_blob(
     let slot = blob.read().unwrap().slot()?;
     let leader = leader_scheduler.get_leader_for_slot(slot);
 
+    // TODO: Once the original leader signature is added to the blob, make sure that
+    // the blob was originally generated by the expected leader for this slot
+
     if leader.is_none() {
         return Ok(());
     }