How to use

There is a README.txt file bundled with this project.

I'm copying the following from that file:

1. Download and enable the module.

2. In your rule, create a new condition, and select
'Site variable to check'.

3. Set the 'The site variable you want to check'
field to be the name of the variable you wish to check against. You do
not need to surround the variable name with quotes.

4. Set the 'The value that the site variable should have'
field to be the value that the variable should be in order for the
condition to return true.