Enforce Sane Minimum Defaults for interval/timeout

Fixes a problem in the cogd option / config parser whereby bad config
(like "interval FIVE" or "timeout 0" are replaced with more amenable
defaults.  This helps to protect an infrastructure from
misconfiguration.

Noticed a problem in the lab with such configs that caused MASSIVE CPU
usage across the entire infrastructure.  0 timeout is never what you
want, and a 0 interval just makes things worse.