This function will format a MAC address as colon-separated hex bytes.
It's really very simple: stdnse.tohex(mac, {separator=":"})
This commit updates all the instances I could find of the varying
convoluted attempts at performing this conversion.
Many scripts were documented as using timespecs (10s, 5000ms, etc) for
timeout script-args, but one 1 or 2 actually did. Now all timeout
script-args will accept timespecs, except those which took a number of
milliseconds, which remain unchanged.
Also fixed some documentation issues (missing script name in arg
description, missing nsedoc for args, etc)
Scripts no longer need to implement caching of datafiles tables in the
registry, since the datafiles.lua library keeps its own cache in the
registry. A side-effect is that scripts should not change the tables
returned by datafiles.parse_{protocols,rpc,services,mac_prefixes}(), as
doing so will affect all other scripts that use those functions.
