PowerDNS service start fix pdns-server 4.2.1-1build2

pdns.service

--- original service config --- 
[Unit]
Description=PowerDNS Authoritative Server
Documentation=man:pdns_server(1) man:pdns_control(1)
Documentation=https://doc.powerdns.com
Wants=network-online.target
After=network-online.target mysqld.service postgresql.service slapd.service mariadb.service

[Service]
ExecStart=/usr/sbin/pdns_server --guardian=no --daemon=no --log-timestamp=no --disable-syslog --write-pid=no
Type=notify
Restart=on-failure
RestartSec=1
StartLimitInterval=0

# Sandboxing
CapabilityBoundingSet=CAP_NET_BIND_SERVICE CAP_SETGID CAP_SETUID CAP_CHOWN CAP_SYS_CHROOT
LockPersonality=true
ProtectControlGroups=true
ProtectHome=true
ProtectKernelModules=true
ProtectKernelTunables=true
# ProtectSystem=full will disallow write access to /etc and /usr, possibly
# not being able to write slaved-zones into sqlite3 or zonefiles.
ProtectSystem=full
RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6
RestrictNamespaces=true
RestrictRealtime=true
SystemCallArchitectures=native
SystemCallFilter=~ @clock @debug @module @mount @raw-io @reboot @swap @cpu-emulation @obsolete

[Install]
WantedBy=multi-user.target
------------

-----modifiled service config ------
[Unit]
Description=PowerDNS Authoritative Server
Documentation=man:pdns_server(1) man:pdns_control(1)
Documentation=https://doc.powerdns.com
Wants=network-online.target
After=network-online.target mysqld.service postgresql.service slapd.service mariadb.service

[Service]
ExecStart=/usr/sbin/pdns_server --guardian=no --daemon=no --log-timestamp=no --disable-syslog --write-pid=no
Type=notify
Restart=on-failure
RestartSec=1
StartLimitInterval=0
RuntimeDirectory=pdns

# Sandboxing
CapabilityBoundingSet=CAP_NET_BIND_SERVICE CAP_SETGID CAP_SETUID CAP_CHOWN CAP_SYS_CHROOT
LockPersonality=true
NoNewPrivileges=true
PrivateDevices=true
PrivateTmp=true
PrivateClock=true
ProtectControlGroups=true
ProtectHome=true
ProtectHostname=True
ProtectKernelModules=true
ProtectKernelTunables=true
# ProtectSystem=full will disallow write access to /etc and /usr, possibly
# not being able to write slaved-zones into sqlite3 or zonefiles.
ProtectSystem=full
RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6
RestrictNamespaces=true
RestrictRealtime=true
SystemCallArchitectures=native
SystemCallFilter=~ @clock @debug @module @mount @raw-io @reboot @swap @cpu-emulation @obsolete

[Install]
WantedBy=multi-user.target
------------------------------------

----- DIFF ---
14d13
< RuntimeDirectory=pdns
19,22d17
< NoNewPrivileges=true
< PrivateDevices=true
< PrivateTmp=true
< PrivateClock=true
25d19
< ProtectHostname=True
39,40d32
-------------