server: Add more elaborate startup messages. (#2731)

These messages based on our prep stage during XL
and prints more informative message regarding
drive information.

This change also does a much needed refactoring.

cmd/handler-utils.go

@@ -22,7 +22,6 @@ import (
 	"mime/multipart"
 	"net/http"
 	"strings"
-	"time"
 )
 
 // Validates location constraint in PutBucket request body.
@@ -124,16 +123,3 @@ func extractPostPolicyFormValues(reader *multipart.Reader) (filePart io.Reader,
 	}
 	return filePart, fileName, formValues, nil
 }
-
-// Send whitespace character, once every 5secs, until CompleteMultipartUpload is done.
-// CompleteMultipartUpload method of the object layer indicates that it's done via doneCh
-func sendWhiteSpaceChars(w http.ResponseWriter, doneCh <-chan struct{}) {
-	for {
-		select {
-		case <-time.After(5 * time.Second):
-			w.Write([]byte(" "))
-		case <-doneCh:
-			return
-		}
-	}
-}