[NSE] Minor feature enhancement for nbstat.nse

["Thomas Buchanan" <TBuchanan () thecompassgrp net>]

Hello,

Here's a patch for nbstat.nse (and datafiles.lua) that adds the ability
to look up MAC address manufacturer information and display it alongside
the MAC address, similar to the way nmap does when scanning IP addresses
on a local network.  The patch add a capture pattern and associated
parse function for nmap-mac-prefixes to nselib/datafiles.lua, and then
utilizes that function in nbstat.nse to lookup MAC address
manufacturers.

Here's an example of how the output has been changed:

Without patch:
Host script results:
| nbstat:
|   NetBIOS name: LATITUDE, NetBIOS user: <unknown>, NetBIOS MAC:
00:1f:3c:6a:38:45
<snip>

With patch:
Host script results:
| nbstat:
|   NetBIOS name: LATITUDE, NetBIOS user: <unknown>, NetBIOS MAC:
00:1f:3c:6a:38:45 (Intel Corporate)
<snip>

Hopefully somebody else will find this useful, it's been a help to me
doing network inventory management.

Comments and questions regarding the patch are appreciated.

Thanks,

Thomas

Attachment: nbstat.patch
Description: nbstat.patch

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