[Samba] chrony configuration for secondary samba DC

[Reindl Harald]

Am 03.06.2018 um 16:48 schrieb Rowland Penny via samba:
> On Sun, 3 Jun 2018 17:37:45 +0300
> Alexei Rozenvaser <alexei.roz at gmail.com> wrote:
> 
>> The output is:
>> alexei at ubuntu-dc:~$ sudo samba -b | grep 'SIGND'
>>    NTP_SIGND_SOCKET_DIR: /var/lib/samba/ntp_signd
> 
> First three letters are NTP and at the moment, Samba only supports the
> use of ntp, whilst other time servers may claim to work with a Samba
> DC, they are not supported

please don't confuse ntp as protocol and ntpd as implementation
"Samba only supports the use of ntp" is nonsense

what pieces of the protocol does samba need so that as example
http://www.openntpd.org/ is not a drop-in replacement?