Nginx receive http2 directive is deprecated warning.

Issue

• Nginx 'Listen … http2 directive is deprecated' Warnings received on restart.

[warn] 1#1: the "user" directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:4-  The old format found in the nginx.conf and which is depreciated.
nginx: [warn] the "user" directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:4
[warn] 1#1: the "listen ... http2" directive is deprecated, use the "http2" directive instead in /etc/nginx/nginx.conf:37