auth docs: clarify absence/presence of pdns-backend-bind

diff --git a/docs/installation.rst b/docs/installation.rst
index 2b25b06f492a374fd2829d004d382e6a84eeb03e..0aaa2c36855f22d214d2c725819f0ffbc767a500 100644 (file)
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -32,7 +32,7 @@ required backend as follows:
 Redhat-based Systems
 ~~~~~~~~~~~~~~~~~~~~
 
-On RedHat based system there are 2 options to install PowerDNS, from
+On RedHat based systems there are 3 options to install PowerDNS, from
 `EPEL <https://fedoraproject.org/wiki/EPEL>`__, the `repository from
 Kees Monshouwer <https://www.monshouwer.eu/download/3rd_party/pdns/>`__
 or from `the PowerDNS repositories <https://repo.powerdns.com>`__:
@@ -49,6 +49,8 @@ The different backends can be installed using
 
     $ sudo yum install pdns-backend-$backend
 
+Note that for some of those package sources, the bind backend is shipped as part of the base ``pdns`` package, and there is no separate ``pdns-backend-bind`` package.
+
 FreeBSD
 ~~~~~~~