server listen directive for IPV4 and IPV6

[shiz]

There is a lot of confusion in the answers I fount about it.

When I installed nginx first, it was the debian jessie version 1.6.2 and the
configuration to listen to both ipv4 and ipv6 was 

#server {
#       listen 80;
#       listen [::]:80;
#
#       server_name example.com;
#
#       root /var/www/example.com;
#       index index.html;
#
#       location / {
#               try_files $uri $uri/ =404;
#       }
#}

Now I use nginx 1.11.10 and the example configuration file only has one
line:
listen       80;


Should I update my configuration?  I might be wrong but I did not see ipv6
requests for a long while.

Last time I changed the listen directive following some recommendation found
on the web, I ended up with servers not listening to anything!

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,272973,272973#msg-272973