RSS Feed/News PayPalRest Requests Compatibility with IPv6 NAT64

[ENXF NET]

From a customer ticket:

We are seeing an issue with Http::reader()->getUntrusted() when fetching PayPal webhook certificate URLs.

In our production environment, DNS resolution for PayPal can return an IPv6 NAT64 address, for example:

64:ff9b::ad00:5c17

When getUntrusted() is used, XenForo appears to reject this address during its local/private IP validation because isLocalIpv6() rejects IPv6 addresses that are not within 2000::/3. This causes the request to fail even though the...
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