Address Ben's PR feedback; better name for fanout callback

lib/gossip/damper.js

@@ -258,6 +258,14 @@ Damper.prototype.hasStarted = function hasStarted() {
     return !!this.dampTimer;
 };
 
+// This function starts what is called "the damp-req subprotocol," which is a
+// fancy name for fanning-out damp-req requests to a random collection of other
+// members. The damp-req asks for the damp scores of members that were previously
+// added to the internal flappers collection of this Damper module.
+//
+// initiateSubprotocol() is called periodically by the background damp timer when
+// "flappers" have been added. If no flappers exist or all flappers have been removed,
+// then the damp timer will be canceled and the subprotocol will not be initiated.
 Damper.prototype.initiateSubprotocol = function initiateSubprotocol(callback) {
     var self = this;
     var config = this.ringpop.config;
@@ -268,11 +276,6 @@ Damper.prototype.initiateSubprotocol = function initiateSubprotocol(callback) {
         return;
     }
 
-    // You may think that a check to verify that flappers actually
-    // exist before firing off the fanout is necessary. I know I did.
-    // But in fact, the subprotocol will only ever be initiated when
-    // there are known flappers. Otherwise the damp timer would never
-    // have been scheduled.
     var flapperAddrs = this._getFlapperAddrs();
     this.logger.info('ringpop damper started', {
         local: this.ringpop.whoami(),
@@ -303,9 +306,9 @@ Damper.prototype.initiateSubprotocol = function initiateSubprotocol(callback) {
         return;
     }
 
-    this._fanoutDampReqs(flapperAddrs, dampReqMembers, rVal, onDampReqs);
+    this._fanoutDampReqs(flapperAddrs, dampReqMembers, rVal, onFanout);
 
-    function onDampReqs(err, res) {
+    function onFanout(err, res) {
         if (err) {
             self.ringpop.stat('increment', 'damper.damp-req.error');
             self.logger.warn('ringpop damper errored out', {