Let's Encrypt Certificate has expired for apt.armbian.com   openssl s_client -connect apt.armbian.com:443 -servername apt.armbian.com < /dev/null 2>&1 | grep -E "(Verify return code|subject|issuer|notBefore|notAfter)"   notAfter=Sep 25 23:05:16 2025 GMT notAfter=Sep 25 23:05:16 2025 GMT subject=CN=apt.armbian.com issuer=C=US, O=Let's Encrypt, CN=E6 Verify return code: 10 (certificate has expired)