+.SS ZONE DIRECTIVE STYLE MODIFIERS
+Each of the zone directives may optionally be followed by one of the
+following characters:
+.TP
+.B *
+Indicates that the zone is unofficial, ie that it is not delegated as
+part of the global Internet DNS and that no attempt should be made to
+find the superzone and check delegations. Note that unofficial, local
+zones should be created with caution. They should be in parts of the
+namespace which are reserved for private use, or belong to the actual
+zone maintainer.
+.TP
+.B ?
+Indicates that the zone is known to be broken and no checks should be
+carried out on it, unless the
+.B \-A
+option is specified.