Function load_server_config 

pub fn load_server_config(
    cert_path: &Path,
    key_path: &Path,
    ca_path: &Path,
) -> Result<ServerConfig, TunnelError>

Load server TLS config with mTLS (client certificate verification)

Arguments

• cert_path - Path to server certificate PEM file
• key_path - Path to server private key PEM file
• ca_path - Path to CA certificate for verifying client certificates