firewall: T9076: add per-remote-group update interval

Add 'set firewall group remote-group <name> interval <value>' to
control how often each remote group list is re-downloaded,
independent of the global resolver-interval that also drives
domain-group/FQDN resolution.

The value accepts plain seconds or time-unit suffixes s/m/h/d/w
(e.g. 4h), range 60 seconds to 4 weeks, enforced at commit time
after conversion. When unset, the group keeps following
'firewall global-options resolver-interval', so existing
configurations are unaffected.

vyos-domain-resolver now tracks a last-update timestamp per
remote group and sleeps until the next due update instead of a
fixed resolver-interval tick, honoring per-group intervals both
shorter and longer than the global one. A group is only stamped
as updated after a successful download; failed downloads fall
back to the cached list and are retried at the resolver cadence
rather than after the full group interval.

human_to_seconds() now treats a plain number as seconds instead
of returning 0.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

0 files changed, 0 insertions, 0 deletions