DDSSEC12 — secure log topic has a year 2038 issue

extensibility(APPENDABLE) // After DDSSEC12-29
struct BuiltinLoggingType {
    octet  facility;  // Set to 0x0A (10). Indicates sec/auth msgs
    LoggingLevel severity;
    Time_t timestamp; // Since epoch 1970-01-01 00:00:00 +0000 (UTC)
    string hostname;  // IP host name of originator
    string hostip;    // IP address of originator
    string appname;   // Identify the device or application 
    string procid;    // Process name/ID for syslog system
    string msgid;     // Identify the type of message
    string message;   // Free-form message

    // Note that certain string keys (SD-IDs) are reserved by IANA
    map<string, NameValuePairSeq>  structured_data; 
};