Remove a lot of obsoleted options

These options were ancient or made obsolete a long time ago, it is
safe to remove them.

Also stop printing ancient options, they should be treated the same as
unknown options.

Removed options: lwres, geoip-use-ecs, sit-secret, use-ixfr,
acache-cleaning-interval, acache-enable, additional-from-auth,
additional-from-cache, allow-v6-synthesis, dnssec-enable,
max-acache-size, nosit-udp-size, queryport-pool-ports,
queryport-pool-updateinterval, request-sit, use-queryport-pool, and
support-ixfr.

lib/ns/query.c

@@ -6691,7 +6691,7 @@ query_checkrrl(query_ctx_t *qctx, isc_result_t result) {
 			/*
 			 * Handle referral to ".", including when recursion
 			 * is off or not requested and the hints have not
-			 * been loaded or we have "additional-from-cache no".
+			 * been loaded.
 			 */
 			constname = dns_rootname;
 			resp_result = DNS_R_DELEGATION;