Custom Key Generator API URL Field Per Variation

[Michael Corbett]

• Add text fields where you can enter a custom key generator API URL for a variation, that is used for key generation (overriding current use of uniqeid). The text returned by API URL is used as the key.

• Possibly add the ability to use one API URL for renewals and one for non-renewals. Also, when using API for renewal, the keygen server can optionally change the current code (instead of reusing the old one for renewal)..

• Also add a checkbox to optionally send order info (order-id, email, etc.) as parameters to the API URLs. Or maybe have a way to specify these directly in the textfield. Maybe something like http://www.example.com/generator.php?user_email={email}&order_number={order-id}