drop usage of historyKeeper.setConfig

lib/hk-util.js

@@ -22,3 +22,12 @@ HK.getHash = function (msg, Log) {
     return msg.slice(0,64);
 };
 
+// historyKeeper should explicitly store any channel
+// with a 32 character id
+HK.STANDARD_CHANNEL_LENGTH = 32;
+
+// historyKeeper should not store messages sent to any channel
+// with a 34 character id
+HK.EPHEMERAL_CHANNEL_LENGTH = 34;
+
+