man: fix dir name in sysctl.d(5)

Pointed out by Коренберг Марк in
https://github.com/systemd/systemd/commit/e0f424790d3dbde136a29a7fa4c2777c2e3fd695#commitcomment-39259499.

diff --git a/man/sysctl.d.xml b/man/sysctl.d.xml
index 2735cb10dd01dbc12a8ea37d3d45d4df7526ccd4..dc10776e9968a022a9beb916b4e006b537bb5c92 100644 (file)
--- a/man/sysctl.d.xml
+++ b/man/sysctl.d.xml
@@ -159,7 +159,7 @@ net.bridge.bridge-nf-call-arptables = 0
 
     <example>
       <title>Set network routing properties for all interfaces</title>
-      <para><filename>/etc/systemd/20-rp_filter.conf</filename>:</para>
+      <para><filename>/etc/sysctl.d/20-rp_filter.conf</filename>:</para>
 
       <programlisting>net.ipv4.conf.default.rp_filter = 2
 net.ipv4.conf.*.rp_filter = 2