Time sync

docs/user-guide/configuration.md

@@ -233,7 +233,7 @@ exploratory.inbound.quantity           | Exploratory inbound tunnels quantity. 3
 exploratory.outbound.length            | Exploratory outbound tunnels length. 2 by default
 exploratory.outbound.quantity          | Exploratory outbound tunnels length. 3 by default
 
-### NTCP2 options
+### NTCP2
 
 Option                                 | Description
 -------------------------------------- | --------------------------------------
@@ -241,6 +241,15 @@ ntcp2.enabled                          | Enable NTCP2. Enabled by default
 ntcp2.published                        | Enable incoming NTCP2 connections. Disabled by default
 ntcp2.port                             | Port to listen for incoming NTCP2 connections (default: auto)
 
+### Time sync
+
+Option                                 | Description
+-------------------------------------- | --------------------------------------
+nettime.enabled                        | Enable NTP sync. Disabled by default
+nettime.ntpservers                     | Comma-separated list of NTP server. pool.ntp.org by default
+nettime.ntpsyncinterval                | NTP time sync interval in hours. 72 by default
+
+
 Local addressbook
 -----------------