Update webhook URL for WordPress 5.5
Created by: wmortada
WordPress 5.5 changes the way it handles URLs and strips out page=CiviCRM
from front-end URLs. See this blog for more details: CiviCRM 5.26 and WordPress - Major Changes
This means that the webhook URL needs to be changed from: /?page=CiviCRM&q=civicrm/gocardless/webhook
to /?civiwp=CiviCRM&q=civicrm/gocardless/webhook
. If you don't to this the webhooks will stop working after upgrading to WordPress 5.5. Note that you must upgrade to CiviCRM > 5.26 before you do this otherwise the newer URL won't work.
We should update the documentation to reflect this. I think the only place it appears is in the README.md. I don't think it appears anywhere in the code.