FTLCONF_ntp_sync_server - multiple servers?

Hello! Is there a way to define 2 upstream NTP servers?

I tried:

FTLCONF_ntp_sync_server: "ts1.univie.ac.at,ts2.univie.ac.at"

FTLCONF_ntp_sync_server: "ts1.univie.ac.at,ts2;univie.ac.at"

FTLCONF_ntp_sync_server: "ts1.univie.ac.at"
FTLCONF_ntp_sync_server: "ts2.univie.ac.at"

None of this works. I couldn't find a hint in the documentation.

Thanks

No.

This option accepts just one server.