A little improvement - use int -> string table in oui.nom instead of string -> string. This saves ~600kb in resulting binary.
[https://github.com/scriptum/netwatch/commit/f0925bc04153d83eec7d23b98669b6486cb1264f](https://github.com/scriptum/netwatch/commit/f0925bc04153d83eec7d23b98669b6486cb1264f)
