Added support for mysqlconfig in plugin configuration file

plugins/newznab/nn_

@@ -13,6 +13,35 @@ data for one specific graph, you need to create a symbolic link with a
 name like nn_<GRAPH> to this script.
 
 To get a graph over numbers of users use nn_users
+=head1 APPLICABLE SYSTEMS
+
+Any MySQL platform, tested by the author on MySQL 5.1.29 and 5.0.51
+
+=head1 CONFIGURATION
+
+This script is used to generate data for several graphs. To generate
+data for one specific graph, you need to create a symbolic link with a
+name like nn_<GRAPH> to this script.
+
+connection parameters - use this in your plugin configuration file.
+
+[nn*]
+env.mysqlconnection DBI:mysql:<yourdatabase>;host=127.0.0.1;port=3306
+env.mysqluser <user>
+env.mysqlpassword <password>
+
+
+=head1 DEPENDENCIES
+
+=over
+
+=item DBD::mysql
+
+=back
+
+=head1 THANKS
+A special thanks to Kjell-Magne Øierud for the mysql_ plugin in munin which
+gave me the inspiration and reusable code to create this plugin.
 
 =head1 LICENSE
 
@@ -46,9 +75,9 @@ use File::Basename;
 #-- CONFIG --#
 
 my %config = (
-    'dsn'        => $env{'mysqlconnection'} || 'dbi:mysql:newznab',
+    'dsn'        => $ENV{'mysqlconnection'} || 'dbi:mysql:newznab',
-    'user'       => $env{'mysqluser'}       || 'test',
+    'user'       => $ENV{'mysqluser'}       || 'test1',
-    'password'   => $env{'mysqlpassword'}   || 'test',
+    'password'   => $ENV{'mysqlpassword'}   || 'test',
 );
 
 my %defaults = (