security/openvpn: security fix upgrade to 2.6.11
ChangeLog: https://github.com/OpenVPN/openvpn/blob/v2.6.11/Changes.rst#overview-of-changes-in-2611
Security: 142c538e-b18f-40a1-afac-c479effadd5c
Security: CVE-2024-5594
Security: CVE-2024-28882
MFH: 2024Q2