handle {via, Module, Name} tuple when receiving a message

Like OTP gen_servers this changes brings support of the via syntax
allowing partisan to find a process registered through an alternative
process registry.

src/partisan_util.erl

@@ -230,7 +230,7 @@ maybe_initiate_parallel_connections(Connections0, Channel, Node, ListenAddr, Par
 
 term_to_iolist(Term) ->
     [131, term_to_iolist_(Term)].
-        
+
 term_to_iolist_([]) ->
     106;
 term_to_iolist_({}) ->
@@ -306,6 +306,9 @@ process_forward(ServerRef, Message) ->
             {global, Name} ->
                 Pid = global:whereis_name(Name),
                 Pid ! Message;
+            {via, Module, Name} ->
+                Pid =  Module:whereis_name(Name),
+                Pid ! Message;
             _ ->
                 ServerRef ! Message,
                 case partisan_config:get(tracing, ?TRACING) of
@@ -338,4 +341,4 @@ process_forward(ServerRef, Message) ->
     catch
         _:Error ->
             lager:info("Error forwarding message ~p to process ~p: ~p", [Message, ServerRef, Error])
-    end.
+    end.