Feature request: allow dnstap-read to accept "-" as a filename argument and read from stdin

Description

A customer would like us to change the dnstap-read utility included with BIND to allow "-" in lieu of a filename to tell the command to read from stdin.

Request

From Support #14576

DNSTAP-READ(1)
SYNOPSIS
dnstap-read [-m] [-p] [-x] [-y] {file}

It would be handy if the "file" argument to dnstap-read was optional. As is customary, omitting the file name should cause dnstap-read to read from stdin, as should a file name of "-". I know that one can use /dev/stdin, but that feels dirty.

This would change the synopsis to:
dnstap-read [-m] [-p] [-x] [-y] [file|-]

What do you think?