Nginx vhost generator includes obsolete directives

I just ran the vhost generator and did an nginx -t after plugging in the code, and got this:

Code:

[14:58][root@ip-172-31-47-125.us-east-2.compute.internal Xa.com]# nginx -t
nginx: [warn] the "http2_max_field_size" directive is obsolete, use the "large_client_header_buffers" directive instead in /usr/local/nginx/conf/conf.d/Xa.com.ssl.conf:23
nginx: [warn] the "http2_max_header_size" directive is obsolete, use the "large_client_header_buffers" directive instead in /usr/local/nginx/conf/conf.d/Xa.com.ssl.conf:24
nginx: [warn] the "http2_max_requests" directive is obsolete, use the "keepalive_requests" directive instead in /usr/local/nginx/conf/conf.d/Xa.com.ssl.conf:25
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful

Obviously just a warning, but thought I'd mention it.

Also, for readability, it might be easier to break out the LE commands a bit more.

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