named-checkconf -i: ignore deprecate warnings
Adds a new option to named-checkconf, -i. If set, named-checkconf will not warn you about deprecated options. This allows people to use named-checkconf in automated deployment precoesses where an operator only cares if their conf is valid, even if it is not optimal.
This was added as a request as part of introducing a policy on removing named.conf options.
Closes #1101 (closed)