Sync and multi-client updates (#1044)

* Update finalized/head sync logic

* Correct sync logging

* Handle status during sync gracefully

beacon_node/network/src/sync/range_sync/mod.rs

@@ -5,6 +5,7 @@ mod batch;
 mod chain;
 mod chain_collection;
 mod range;
+mod sync_type;
 
 pub use batch::Batch;
 pub use batch::BatchId;