caddy/caddytest/integration/caddyfile_adapt/global_server_options_single.txt

{
	servers {
		listener_wrappers {
			tls
		}
		timeouts {
			read_body 30s
			read_header 30s
			write 30s
			idle 30s
		}
		max_header_size 100MB
		protocol {
			allow_h2c
			experimental_http3
			strict_sni_host
		}
	}
}

foo.com {	
}

----------
{
	"apps": {
		"http": {
			"servers": {
				"srv0": {
					"listen": [
						":443"
					],
					"listener_wrappers": [
						{
							"wrapper": "tls"
						}
					],
					"read_timeout": 30000000000,
					"read_header_timeout": 30000000000,
					"write_timeout": 30000000000,
					"idle_timeout": 30000000000,
					"max_header_bytes": 100000000,
					"routes": [
						{
							"match": [
								{
									"host": [
										"foo.com"
									]
								}
							],
							"terminal": true
						}
					],
					"strict_sni_host": true,
					"experimental_http3": true,
					"allow_h2c": true
				}
			}
		}
	}
}