Correct to use name socket mode instead of mask

Co-Authored-By: fffonion <[email protected]>
Signed-off-by: Wangchong Zhou <[email protected]>

main.go

@@ -143,7 +143,7 @@ func main() {
 		statsdListenTCP      = kingpin.Flag("statsd.listen-tcp", "The TCP address on which to receive statsd metric lines. \"\" disables it.").Default(":9125").String()
 		statsdListenUnixgram = kingpin.Flag("statsd.listen-unixgram", "The Unixgram socket path to receive statsd metric lines in datagram. \"\" disables it.").Default("").String()
 		// not using Int here because flag diplays default in decimal, 0755 will show as 493
-		statsdUnixSocketUmask = kingpin.Flag("statsd.unixsocket-umask", "The umask of the unix socket.").Default("755").String()
+		statsdUnixSocketMode = kingpin.Flag("statsd.unixsocket-mode", "The permission mode of the unix socket.").Default("755").String()
 		mappingConfig         = kingpin.Flag("statsd.mapping-config", "Metric mapping configuration file name.").String()
 		readBuffer            = kingpin.Flag("statsd.read-buffer", "Size (in bytes) of the operating system's transmit read buffer associated with the UDP or Unixgram connection. Please make sure the kernel parameters net.core.rmem_max is set to a value greater than the value specified.").Int()
 		dumpFSMPath           = kingpin.Flag("debug.dump-fsm", "The path to dump internal FSM generated for glob matching as Dot file.").Default("").String()
@@ -226,9 +226,9 @@ func main() {
 		// so we can't chmod it either
 		if _, err := os.Stat(*statsdListenUnixgram); !os.IsNotExist(err) {
 			// convert the string to octet
-			perm, err := strconv.ParseInt("0"+string(*statsdUnixSocketUmask), 8, 32)
+			perm, err := strconv.ParseInt("0"+string(*statsdUnixSocketMode), 8, 32)
 			if err != nil {
-				log.Warnf("Bad permission %s: %v, ignoring\n", *statsdUnixSocketUmask, err)
+				log.Warnf("Bad permission %s: %v, ignoring\n", *statsdUnixSocketMode, err)
 			} else {
 				err = os.Chmod(*statsdListenUnixgram, os.FileMode(perm))
 				if err != nil {