Add ejabberd_stats_ plugin and it's image

* connected users
* in/out s2s

plugins/ejabberd/ejabberd_stats_/ejabberd_stats_

@@ -0,0 +1,84 @@
+#!/usr/bin/env bash
+
+# ejabberd_stats_ revision 1 (Nov 2013)
+#
+# Tested with ejabberd 2.1.x
+#
+# This plugin is capable to show:
+# - ejabberd connected users
+# - in/out s2s connections
+#
+# Required permissions:
+# - run ejabberdctl
+#
+# OS: *NIX
+#
+# Author: Artem Sheremet <dot.doom@gmail.com>
+#
+# Configuration:
+# - set env.ejabberdctl to ejabberdctl path
+
+#%# family=auto
+#%# capabilities=autoconf suggest
+
+EJABBERDCTL=${ejabberdctl:-$(which ejabberdctl)}
+SCRIPT_NAME=$(basename $0)
+STATS_TYPE="${SCRIPT_NAME/ejabberd_stats_/}"
+
+function ejabberd_stats_connected_users() {
+	local ejabberdctl_cmd=connected_users_number
+	if [ "$1" = "config" ]; then
+		cat <<CONFIG
+graph_title ejabberd stats - connected users
+graph_args --base 1000 --lower-limit 0
+graph_vlabel users
+graph_info The number of currently connected users, as of ejabberd report
+graph_category ejabberd
+graph_order active
+connected.label Connected users
+connected.draw AREA
+connected.info ejabberdctl $ejabberdctl_cmd
+CONFIG
+	else
+		echo "connected.value $($EJABBERDCTL $ejabberdctl_cmd)"
+	fi
+}
+
+function ejabberd_stats_s2s() {
+	local ejabberdctl_cmd_in=incoming_s2s_number
+	local ejabberdctl_cmd_out=outgoing_s2s_number
+	if [ "$1" = "config" ]; then
+		cat <<CONFIG
+graph_title ejabberd stats - s2s connections
+graph_args --lower-limit 0
+graph_vlabel active connections
+graph_category ejabberd
+graph_order incoming outgoing
+incoming.label incoming s2s
+incoming.info ejabberdctl $ejabberdctl_cmd_in
+outgoing.label outgoing s2s
+outgoing.info ejabberdctl $ejabberdctl_cmd_out
+CONFIG
+	else
+		cat <<RESULTS
+incoming.value $($EJABBERDCTL $ejabberdctl_cmd_in)
+outgoing.value $($EJABBERDCTL $ejabberdctl_cmd_out)
+RESULTS
+	fi
+}
+
+case $1 in
+	autoconf)
+		[ -x "$EJABBERDCTL" ] && echo yes || echo no
+		exit 0
+		;;
+	suggest)
+		cat <<SUGGESTIONS
+connected_users
+s2s
+SUGGESTIONS
+		exit 0
+		;;
+esac
+
+ejabberd_stats_${STATS_TYPE} $1