make notification as separate package (#5294)

* Remove old notification files

* Add net package

* Add event package

* Modify minio to take new notification system

cmd/api-resources.go

@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2015 Minio, Inc.
+ * Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -79,14 +79,6 @@ func getObjectResources(values url.Values) (uploadID string, partNumberMarker, m
 	return
 }
 
-// Parse listen bucket notification resources.
-func getListenBucketNotificationResources(values url.Values) (prefix []string, suffix []string, events []string) {
-	prefix = values["prefix"]
-	suffix = values["suffix"]
-	events = values["events"]
-	return prefix, suffix, events
-}
-
 // Validates filter values
 func validateFilterValues(values []string) (err APIErrorCode) {
 	for _, value := range values {