adapt to modern ntp.conf file used by ntpsec

modules/conf_ntp.sh

@@ -39,7 +39,11 @@ conf_ntp()
     prnt I "Installing NTP configuration file..."
     local dest="${conf_file}.work"
     backup_dist "$conf_file"
-    install_file ntp.conf "$dest"
+    if [[ -s $NTP_SERV ]]; then
+	install_file ${NTP_SERV}.conf "$dest"
+    else
+	install_file ntp.conf "$dest"
+    fi
     tag_file "$dest"
     local line=""
     for srv in $NTP_SERVERS; do

repo/common/ntpsec.conf

@@ -0,0 +1,53 @@
+# /etc/ntpsec/ntp.conf, configuration for ntpd; see ntp.conf(5) for help
+
+driftfile /var/lib/ntpsec/ntp.drift
+leapfile /usr/share/zoneinfo/leap-seconds.list
+
+# To enable Network Time Security support as a server, obtain a certificate
+# (e.g., with Let's Encrypt), place the cert and key in the paths below, and
+# uncomment:
+# nts cert /etc/ntpsec/cert-chain.pem
+# nts key /etc/ntpsec/key.pem
+# nts enable
+
+# You must create /var/log/ntpsec (owned by ntpsec:ntpsec) to enable logging.
+#statsdir /var/log/ntpsec/
+#statistics loopstats peerstats clockstats
+#filegen loopstats file loopstats type day enable
+#filegen peerstats file peerstats type day enable
+#filegen clockstats file clockstats type day enable
+
+# This should be maxclock 7, but the pool entries count towards maxclock.
+tos maxclock 11
+
+# Comment this out if you have a refclock and want it to be able to discipline
+# the clock by itself (e.g. if the system is not connected to the network).
+tos minclock 4 minsane 3
+
+# Specify one or more NTP servers.
+
+# Public NTP servers supporting Network Time Security:
+# server time.cloudflare.com nts
+@SERVERLIST@
+
+# pool.ntp.org maps to about 1000 low-stratum NTP servers.  Your server will
+# pick a different set every time it starts up.  Please consider joining the
+# pool: <https://www.pool.ntp.org/join.html>
+#pool 0.debian.pool.ntp.org iburst
+#pool 1.debian.pool.ntp.org iburst
+#pool 2.debian.pool.ntp.org iburst
+#pool 3.debian.pool.ntp.org iburst
+
+# Access control configuration; see /usr/share/doc/ntpsec-doc/html/accopt.html
+# for details.
+#
+# Note that "restrict" applies to both servers and clients, so a configuration
+# that might be intended to block requests from certain clients could also end
+# up blocking replies from your own upstream servers.
+
+# By default, exchange time with everybody, but don't allow configuration.
+restrict default kod nomodify noquery limited
+
+# Local users may interrogate the ntp server more closely.
+restrict 127.0.0.1
+restrict ::1