Enable outbound webhooks

This dynamic configuration parameter switches outbound webhooks on and off for the entire Comentario instance.

• When set to On (the default), events occurring on a domain are queued for delivery to the webhooks registered on it, and domain owners can register, edit, and test webhooks.
• If set to Off, no event is queued and no delivery is attempted. Existing webhooks are left untouched: they remain visible and can be deleted, but not created or modified. Switching the parameter back on resumes deliveries, without replaying the events that occurred in the meantime.

The instance operator can also disable webhooks unconditionally, using the --wh.disable static configuration option. That switch takes precedence: while it’s in effect, this parameter has no consequence.