Extend --conf-dir to allow filtering on file suffixes.
diff --git a/dnsmasq.conf.example b/dnsmasq.conf.example
index 206f4d1..83924fc 100644
--- a/dnsmasq.conf.example
+++ b/dnsmasq.conf.example
@@ -640,3 +640,9 @@
# Include another lot of configuration options.
#conf-file=/etc/dnsmasq.more.conf
#conf-dir=/etc/dnsmasq.d
+
+# Include all the files in a directory except those ending in .bak
+#conf-dir=/etc/dnsmasq.d,.bak
+
+# Include all files in a directory which end in .conf
+#conf-dir=/etc/dnsmasq.d/*.conf
\ No newline at end of file