domain socket.
Version 6 (no authentication) : changed format of client accesses by index
- (using new request/reply types) and manual timestamp, new fields and flags
- in NTP source request and report, new commands: ntpdata, refresh,
- serverstats
+ (using new request/reply types) and manual timestamp, added new fields and
+ flags to NTP source request and report, made length of manual list constant,
+ added new commands: ntpdata, refresh, serverstats, shutdown
*/
#define PROTO_VERSION_NUMBER 6