document bindbackend launch limitation

diff --git a/docs/settings.rst b/docs/settings.rst
index fb4cc84d8f9c39cab985d538c05a1c4f82e2f650..91d40b3abe996b4e61a7321b535cd4be1a75c450 100644 (file)
--- a/docs/settings.rst
+++ b/docs/settings.rst
@@ -659,6 +659,8 @@ configuration item names change: e.g. ``gmysql-host`` is available to
 configure the ``host`` setting of the first or main instance, and
 ``gmysql-server2-host`` for the second one.
 
+Running multiple instances of the bind backend is not allowed.
+
 .. _setting-load-modules:
 
 ``load-modules``