Handle Microsoft End-of-Life for RC4

Microsoft announced the end-of-life for RC4 support: https://techcommunity.microsoft.com/blog/coreinfrastructureandsecurityblog/what-changed-in-rc4-with-the-january-2026-windows-update-and-why-it-is-important/4504732.

All edge filers before version 7.11.5100.30 use RC4 for Kerberos authentication, for backwards compatibility reasons. It must be disabled.

To disable RC4:

1. As an edge filer administrator, access the edge filer CLI interface.
2. Run the following CLI: set /config/fileservices/cifs/AESEncryptionKerberos true

RC4 is no longer used.