Remove XL references in public docs to Erasure. (#3725)

Ref #3722

cmd/server-main.go

@@ -466,12 +466,12 @@ func serverMain(c *cli.Context) {
 	globalObjectAPI = newObject
 	globalObjLayerMutex.Unlock()
 
-	// Set startup time
-	globalBootTime = time.Now().UTC()
-
 	// Prints the formatted startup message once object layer is initialized.
 	printStartupMessage(apiEndPoints)
 
+	// Set uptime time after object layer has initialized.
+	globalBootTime = time.Now().UTC()
+
 	// Waits on the server.
 	<-globalServiceDoneCh
 }