+FORWARDED(zone, ip...)
+ Define a forwarding zone. All queries are forwarded to the
+ specified name servers.
+
+BLACKHOLE(zone)
+ Define an empty zone according to RFC 6303. This is usually done
+ for zones for which clients are known to erroneously ask queries
+ (e.g., reverse resolving of link-local addresses). The contents
+ served for these zones is taken from cf/blackhole.
+
+ZONE_OPTIONS(`options;
+ more options;
+')
+ Define options to be inserted to all subsequent zone declarations
+ until the next ZONE_OPTIONS command. Please keep in mind that the
+ semicolon character act as M4 comment, so you need to put the
+ closing quote at a separate line. See our example cf/domains.
+
+CONFIG(...)
+ Insert user data to named.conf, again beware of semicolons.