Put a fork in it, `drupal_variable` is done.

This allows you to manage the variables for each site by namepacing the
title. Just like in most programming languages, the scope separator is
the double colon.

For example:

    drupal_variable { 'mysite.example.com::clean_url':
      ensure => 'present',
      value  => '0',
    }

You can manage the default site variables by leaving the scope blank:

    drupal_variable { 'clean_url':
      ensure => 'present',
      value  => '0',
    }

or by specifying it explicitly:

    drupal_variable { 'default::clean_url':
      ensure => 'present',
      value  => '0',
    }