Use ordered_set everywhere.

src/syn_backbone.erl

@@ -106,7 +106,7 @@ get_anti_entropy_settings(Module) ->
 init([]) ->
     %% create ETS tables
     %% entries have structure {Name, Pid, Meta, Clock, MonitorRef, Node}
-    ets:new(syn_registry_by_name, [set, public, named_table, {read_concurrency, true}, {write_concurrency, true}]),
+    ets:new(syn_registry_by_name, [ordered_set, public, named_table, {read_concurrency, true}, {write_concurrency, true}]),
     %% entries have format {{Pid, Name}, Meta, Clock, MonitorRef, Node}
     ets:new(syn_registry_by_pid, [ordered_set, public, named_table, {read_concurrency, true}, {write_concurrency, true}]),
     %% entries have format {{GroupName, Pid}, Meta, MonitorRef, Node}