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)
Nick to remove this, but it turns out nmap.pcap_open has a bad failure
mode when you're not root. It sleeps for several seconds then throws an
error. So rather than tackle that I'll add this check back to the
script.
