Update timeout script-args to use standard timespec

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)