Where is "hash?"

[Bob Bernstein <poobah%ruptured-duck.com@localhost>]

Not too long ago a resident of this venue shared a 
wonderful document describing how to set up sasl for 
postfix. For today's purpose, here is the pertinent 
snippet:

--chomp--

   /etc/postfix/sasl_passwd (for security set ownership to 
  root:wheel, permissions to 600) [mx.sdf.org]:submission 
  sdf_login.sdf.org:smtp_passwd

     hash /etc/postfix/{generic,sasl_passwd}, then check 
   and reload configs:

--chomp--

You'll note that word, "hash." I don't have a "hash" on 
mynew NetBSD install, and I cannot determine what I must 
install to obtain one!

The document is here:
https://sdf.org/?tutorials/smtpauth#postfix-netbsd6



Thank you,

-- 
"In our age there is no such thing as ‘keeping out of 
politics’. All issues are political issues, and politics 
itself is a mass of lies, evasions, folly, hatred, and 
schizophrenia."

 George Orwell "Politics and the English Language" (1946)