Fix: Issue 138

[pabamato]

Description of the Change

Set the correct value to site_public if RSA_FORBID_RESTRICTION is defined

Alternate Designs

Benefits

Mimic core behavior

Possible Drawbacks

Verification Process

• Define RSA_FORBID_RESTRICTION to true in wp-config.php
• Go to settings>reading and verify the correct option is checked
• Check robots.txt content is correct and matches the same output as when the constant was not defined

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests passed.

Applicable Issues

#138