[master] update README

diff --git a/README b/README
index b98de2cb394fcb89619f321f79f7693f8797d9ae..bb1a9edabed2906df950cd7393f87aa3afc53bfd 100644 (file)
--- a/README
+++ b/README
@@ -127,8 +127,11 @@ BIND 9.10.0
           zones. This can simplify the process of rolling DNSSEC keys
           by guaranteeing that cached signatures will have expired
           within the specified amount of time.
-        - "dig +subnet" sends an EDNS client-subnet option when
-           querying.
+        - "dig +subnet" sends an EDNS CLIENT-SUBNET option when
+          querying.
+        - "dig +expire" sends an EDNS EXPIRE option when querying.
+          When sent with an SOA query, this will report the expiry
+          time of a slave zone.
         - New "dnssec-coverage" tool to check DNSSEC key coverage
           for a zone and report if a lapse in signing coverage has
           been inadvertently scheduled.