Fix link to IPN setup guide.

[Drew Angell]

In the PayPal IPN settings we have a link to PayPal's IPN setup guide...

It just has some extra garbage on the end we need to fix...

https://developer.paypal.com/webapps/developer/docs/classic/ipn/integration-guide/IPNSetup/%20

We should change that to: https://developer.paypal.com/docs/classic/ipn/integration-guide/IPNSetup/#id089EG030E5Z

Just need to make sure there aren't any extra spaces on the end, which is what caused the URL encoded value of %20 to show up at the end and breaks the URL.

[Pp Dev]

Fix link to IPN setup guide, ref #71

→ <<cset e99c1e318617>>

[Pp Dev]

Resolve