Mention += in the docs plus an example

diff --git a/pdns/recursordist/docs/index.rst b/pdns/recursordist/docs/index.rst
index 0f740703612df542314afe724be5fc418931cf1f..d4b30c0edbcec1d406cd9314187830e8ecfde3f7 100644 (file)
--- a/pdns/recursordist/docs/index.rst
+++ b/pdns/recursordist/docs/index.rst
@@ -8,7 +8,7 @@ Introduction
 The PowerDNS Recursor is a high-performance DNS recursor with built-in scripting capabilities.
 It is known to power the resolving needs of over 150 million internet connections.
 
-The documentation is only for the 4.1 series, users of older versions are urged to upgrade!
+The documentation is only for the 4.1 and higher series, users of older versions are urged to upgrade!
 
 This documentation is also available as a `PDF document <PowerDNS-Recursor.pdf>`_.
 

diff --git a/pdns/recursordist/docs/settings.rst b/pdns/recursordist/docs/settings.rst
index 5c2b7bc4ffa25f42587218045c9610156daa013f..27495cfb1c082c6364b08197ff754773d1bb3986 100644 (file)
--- a/pdns/recursordist/docs/settings.rst
+++ b/pdns/recursordist/docs/settings.rst
@@ -12,6 +12,14 @@ As an example:
  - ``serve-rfc1918=off`` or ``serve-rfc1918=no`` means: do not serve those zones.
  - Anything else means: do serve those zones.
 
+You can use ``+=`` syntax to set some variables incrementally, but this
+requires you to have at least one non-incremental setting for the
+variable to act as base setting. This is mostly useful for
+:ref:`setting-include-dir` directive. An example::
+
+  forward-zones = foo.example.com=192.168.100.1;
+  forward-zones += bar.example.com=[1234::abcde]:5353;
+
 .. _setting-allow-from:
 
 ``allow-from``