The tayga service does not start automatically

[ihidchaos]

Describe the bug A clear and concise description of what the bug is. The tayga service does not start automatically, so NAT64 is not available by default. To Reproduce Information to reproduce the behavior, including: follow OpenThread Border Router Build and Configuration

1. Git commit id 089271cbf530239072fa426af9896efd21019b73
2. IEEE 802.15.4 hardware platform nRF52840
3. Build steps
4. Network topology

Expected behavior A clear and concise description of what you expected to happen. The tayga service should start automatically. Console/log output If applicable, add console/log output to help explain your problem.

pi@raspberrypi:~ $ sudo systemctl status tayga
¡ñ tayga.service - LSB: userspace NAT64
   Loaded: loaded (/etc/init.d/tayga; generated)
   Active: inactive (dead)
     Docs: man:systemd-sysv-generator(8)
pi@raspberrypi:~ $ ping 64:ff9b::8.8.8.8
connect: Network is unreachable
pi@raspberrypi:~ $ sudo systemctl start tayga
pi@raspberrypi:~ $ ping 64:ff9b::8.8.8.8
PING 64:ff9b::8.8.8.8(64:ff9b::808:808) 56 data bytes
64 bytes from 64:ff9b::808:808: icmp_seq=2 ttl=112 time=140 ms
64 bytes from 64:ff9b::808:808: icmp_seq=3 ttl=112 time=140 ms
^C
--- 64:ff9b::8.8.8.8 ping statistics ---
3 packets transmitted, 2 received, 33.3333% packet loss, time 45ms
rtt min/avg/max/mdev = 140.046/140.211/140.376/0.165 ms

Additional context Add any other context about the problem here.

[bukepo]

It seems this is an intended behavior. nat64_start is only called in script/server.