Add HAproxy input

Change-Id: I3bebda6fd63ddd7fc913f5df1fa51fa9a82e8050
diff --git a/telegraf/files/input/haproxy.conf b/telegraf/files/input/haproxy.conf
new file mode 100644
index 0000000..e054b0e
--- /dev/null
+++ b/telegraf/files/input/haproxy.conf
@@ -0,0 +1,4 @@
+[[inputs.haproxy]]
+  servers = [{%- for server in values.servers|default([]) %}"{{ server }}"{%- if not loop.last%}, {% endif %} {%- endfor %}]
+
+{%- include 'telegraf/files/input/_tags.conf' %}