add header for server pools to docs

diff --git a/pdns/README-dnsdist.md b/pdns/README-dnsdist.md
index 5128dcf54eb66bc7239120262b8b794429ece73b..f0d6ee5a6b327b32f75ef4c4fff09b569cff3d56 100644 (file)
--- a/pdns/README-dnsdist.md
+++ b/pdns/README-dnsdist.md
@@ -97,6 +97,9 @@ To change the QPS for a server:
 > getServer(0):setQPS(1000)
 ```
 
+Server pools
+------------
+
 Now for some cool stuff. Let's say we know we're getting a whole bunch of
 traffic for a domain used in DoS attacks, for example 'sh43354.cn'. We can
 do two things with this kind of traffic. Either we block it outright, like