[NSE][patch] Keep only one copy of mac_prefixes table in registry

[Daniel Miller <bonsaiviking () gmail com>]

List,

The scripts address-info, lltd-discovery, snmp-interfaces, and nbstat 
all make use of the datafiles.parse_mac_prefixes function, which parses 
the nmap-mac-prefixes file and returns a table with the results. The 
file is almost 400K, so the data structure is probably at least that 
large. In order to avoid parsing the file multiple times, each script 
stores the results of the parsing in a different area of the 
nmap.registry. I've attached a patch to allow them to all make use of 
the same table, avoiding up to 3 extra file parses and 3 extra copies of 
the table in memory.

I'd appreciate a second look to be sure I didn't mess something up.

Dan

Attachment: mac_prefixes.patch
Description:

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