[collectd] Configuration for disk plugin

[Pavel Georgiev]

According to 
http://collectd.org/documentation/manpages/collectd.conf.5.shtml#plugin_disk 
the disk plugin accepts configuration but if I add:
<Plugin disk>
  Disk "sda"
</Plugin>

I get these in logs:
Found a configuration for the `disk' plugin, but the plugin isn't loaded or 
didn't register a configuration callback.


Does disk plugin accept configuration after all, I`d like to collect info just 
for the device itself, not per partition stats (I guess if the plugin accepts 
configuration I could say Disk "sd.$").

Collectd 4.3.0 on Ubuntu 8.04.