[sickbeard] Add perldoc header

Signed-off-by: Olivier Mehani <shtrom@ssji.net>

plugins/sickbeard/sickbeard

@@ -1,37 +1,66 @@
 #!/usr/bin/perl
-#
-# Munin plugins for Sick-Beard
-#
-# Copyright (C) 2012 - Blauwbek
-# Copyright (C) 2012 - Thiago
-# Copyright (C) 2019 - Olivier Mehani <shtrom+munin@ssji.net>, for the
-# 		       multigraph support and better error handling
-#
-# Sick-Beard       : http://sickbeard.com/
-#
-# SPDX-License-Identifier: GPL-3.0-or-later
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-# Requires: JSON::Any
-#           LWP::UserAgent
-#
-# Configuration example
-# [sickbeard*]
-# env.host http://host:port/
-# env.api apikey
-#
+# -*- perl -*-
+
+=head1 NAME
+
+sickbeard - Munin multigraph plugin for Sick-Beard and forks (e.g.,
+SickChill)
+
+=head1 DESCRIPTION
+
+This plugin uses the Sick-Beard API (also implemented by forks such as
+SickChill) to collect and report on the numbers of shows (total and
+active), and episodes (downloaded, snatched, and all) currently tracked
+by the app.
+
+It is a drop-in replacement for sickbeard_shows and sickbeard_episodes,
+reusing the vast majority of the code, and providing the same graphs and
+data series.
+
+Sick-Beard       : http://sickbeard.com/
+
+SickChill        : https://sickchill.github.io/
+
+=head1 REQUIREMENTS
+
+JSON::Any, LWP::UserAgent
+
+=head1 CONFIGURATION
+
+You need to specify the host/port of the Sick-Beard as well as API key
+to use.
+
+	[sickbeard*]
+	 env.host http://host:port/
+	 env.api apikey
+
+=head1 AUTHORS
+
+Copyright (C) 2012 - Blauwbek
+
+Copyright (C) 2012 - Thiago
+
+Copyright (C) 2019 - Olivier Mehani <shtrom+munin@ssji.net>, for the
+multigraph support and better error handling
+
+=head1 LICENSE
+
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+=cut
 
 use strict;
 use JSON::Any;