Merge branch '1782-ipv6-docs' into 'master'

Documentation update wrt IPv6 listening.

Closes #1782

See merge request isc-projects/bind9!3642

CHANGES

@@ -1,3 +1,7 @@
+5430.	[doc]		Update docs - with netmgr we're creating separate
+			socket for each IPv6 interface, just as with IPv4.
+			[GL #1782]
+
 5429.	[cleanup]	Move BIND binaries which are neither daemons nor
 			administrative programs to $bindir. [GL #1724]
 

doc/arm/reference.rst

@@ -2433,26 +2433,6 @@ ports on which the server listens for incoming queries sent using
 IPv6. If not specified, the server listens on port 53 on all IPv6
 interfaces.
 
-When
-
-::
-
-   { any; }
-
-is specified as the ``address_match_list`` for the ``listen-on-v6``
-option, the server does not bind a separate socket to each IPv6
-interface address as it does for IPv4, if the operating system has enough
-API support for IPv6 (specifically if it conforms to :rfc:`3493` and
-:rfc:`3542`). Instead, it listens on the IPv6 wildcard address. If the system
-only has incomplete API support for IPv6, however, the behavior is the
-same as that for IPv4.
-
-A list of particular IPv6 addresses can also be specified, in which case
-the server listens on a separate socket for each specified address,
-regardless of whether the desired API is supported by the system. IPv4
-addresses specified in ``listen-on-v6`` are ignored, with a logged
-warning.
-
 Multiple ``listen-on-v6`` options can be used. For example,
 
 ::

doc/notes/notes-current.rst

@@ -122,6 +122,11 @@ Feature Changes
    ``rndc``, ``rndc-confgen``, and ``tsig-confgen`` were left in
    ``$sbindir``. [GL #1724]
 
+-  listen-on-v6 { any; } creates separate sockets for all interfaces,
+   while previously it created one socket on systems conforming to
+   :rfc:`3493` and :rfc:`3542`, this change was introduced in 9.16.0
+   but accudently ommited from documentation.
+
 Bug Fixes
 ~~~~~~~~~