doc: commit forgotten file

doc/conf.py

@@ -223,7 +223,7 @@ latex_domain_indices = False
 # (source start file, name, description, authors, manual section).
 man_pages = [
     ('reference', 'knot.conf', 'Knot DNS configuration file', author, 5),
-    ('utils_knsec3hash', 'knsec3hash', "Simple utility to compute NSEC3 hash", author, 1),
+    ('man_knsec3hash', 'knsec3hash', "Simple utility to compute NSEC3 hash", author, 1),
 ]
 
 # If true, show URL addresses after external links.

doc/man_knsec3hash.rst

+knsec3hash
+==========
+
+Synopsis
+--------
+
+:program:`knsec3hash` {*salt*} {*algorithm*} {*iterations*} {*domain-name*}
+
+Description
+-----------
+
+The utility generates NSEC3 hash for given domain name and parameters of NSEC3 hash.
+
+Arguments
+---------
+
+`salt`
+  Specifies binary salt encoded as a hexadecimal string.
+
+`allgorithm`
+  Speifies hashing algorithm number. Currently the only supported algorithm is SHA-1 (number 1).
+
+`iterations`
+  Specifies the number of additional iterations of the hashing algorithm.
+
+`domain-name`
+  Specifies the domain name to be hashed.
+
+Example
+-------
+
+::
+
+  $ knsec3hash c01dcafe 1 10 knot-dns.cz
+  7PTVGE7QV67EM61ROS9238P5RAKR2DM7 (salt=c01dcafe, hash=1, iterations=10)
+
+See Also
+--------
+
+:rfc:`5155` - DNS Security (DNSSEC) Hashed Authenticated Denial of Existence.
+
+:manpage:`knotc(8)`, :manpage:`knotd(8)`.