update-policy wildcard grant

[Jim Popovitch]

Hello!

I started on #bind, moved on to the ARM, and now I am here.

Here is what I want:

   update-policy {grant webserver-tsig-key wildcard _acme-challenge.* TXT;};

This is what I get:

   ~$ named-checkconf 
   /etc/bind/named.conf:73: '_acme-challenge.*' is not a wildcard

What am I doing wrong?

tia!

-Jim P.