+ ## There's a grim hack here: a primary-address entry may have the form
+ ## REAL!FAKE. If the REAL address is not a local address then this
+ ## is used as the master address; otherwise the FAKE address is used.
+ ## This is useful for inter-view updates of dynamic zones on the same
+ ## host. I suggest abusing 127.0.0.0/8 addresses for this kind of
+ ## chicanery.