named-checkzone defaults

README

@@ -447,6 +447,10 @@ Building
 				    -DDIG_SIGCHASE_BU=1)
 		Disable dropping queries from particular well known ports.
 		  -DNS_CLIENT_DROPPORT=0
+	        Sibling glue checking in named-checkzone is enabled by default.
+		To disable the default check set.  -DCHECK_SIBLING=0
+		named-checkzone checks out-of-zone addresses by default.
+		To disable this default set.  -DCHECK_LOCAL=0
 
 	    LDFLAGS
 		Linker flags. Defaults to empty string.