Add script to regenerate cloudflare.conf as needed

Author: pjeby

cloudflare-regen

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+cf_networks() {
+	echo "# From $1"
+	printf 'set_real_ip_from %s;\n' $(curl -sS "$1" | sort)
+	echo ""
+}
+
+cf_conf() {
+	echo "# CloudFlare"
+	echo ""
+	cf_networks https://www.cloudflare.com/ips-v4
+	cf_networks https://www.cloudflare.com/ips-v6
+	echo "real_ip_header X-Forwarded-For;"
+	echo "real_ip_recursive on;"
+	echo ""
+}
+
+# Generate cloudflare.conf from CloudFlare's public network lists
+cf_conf >tpl/etc/nginx/cloudflare.conf