[AndyB] User upgrade expired V1.6

Creates a conversation when a members account upgrade has expired.
This add-on runs once immediately after the members account upgrade has expired.

(Example of conversation)




(Example of Options page)





Features:

• Conversations are created automatically via Cron entry.
• All phrases start with userupgradeexpired_ for your convenience.

Setup:
Update the options page with your Account upgrades link and Starter username.

Questions and Answers:
Q: When does the add-on run?
A: It runs every 10 minutes and checks for any user upgrades which have expired within the past 10 minutes.
Q: Will an email also be sent?
A: Yes if the member has "Receive email when a new conversation message is received" selected in their preferences.