Added time --input-raw-max-wait

In some low traffic cases you can have cases when time between request minutes.
Additionally increasing speed can be not an option.
Now you can "skip" this pauses, by seetting max wait time

input_file.go

@@ -196,12 +196,13 @@ type FileInput struct {
 	loop        bool
 	readDepth   int
 	dryRun      bool
+	maxWait     time.Duration
 
 	stats *expvar.Map
 }
 
 // NewFileInput constructor for FileInput. Accepts file path as argument.
-func NewFileInput(path string, loop bool, readDepth int, dryRun bool) (i *FileInput) {
+func NewFileInput(path string, loop bool, readDepth int, maxWait time.Duration, dryRun bool) (i *FileInput) {
 	i = new(FileInput)
 	i.data = make(chan []byte, 1000)
 	i.exit = make(chan bool)
@@ -211,6 +212,7 @@ func NewFileInput(path string, loop bool, readDepth int, dryRun bool) (i *FileIn
 	i.readDepth = readDepth
 	i.stats = expvar.NewMap("file-" + path)
 	i.dryRun = dryRun
+	i.maxWait = maxWait
 
 	if err := i.init(); err != nil {
 		return
@@ -351,6 +353,10 @@ func (i *FileInput) emit() {
 				diff = int64(float64(diff) / i.speedFactor)
 			}
 
+			if i.maxWait > 0 && diff > int64(i.maxWait) {
+				diff = int64(i.maxWait)
+			}
+
 			if diff >= 0 {
 				lastTime = payload.timestamp