add possibility for unbound blocklist

tools/create_dns_blocklist.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+set -euo pipefail
+
+# Download select set of malware blocklists from The Firebog's "The Big Blocklist
+# Collection" [0] and block access to them with Unbound by returning NXDOMAIN.
+#
+#   [0]: https://firebog.net
+(
+  # Malicious Lists
+  curl -sSf "https://raw.githubusercontent.com/DandelionSprout/adfilt/master/Alternate%20versions%20Anti-Malware%20List/AntiMalwareHosts.txt" ;
+  curl -sSf "https://osint.digitalside.it/Threat-Intel/lists/latestdomains.txt" ;
+  curl -sSf "https://s3.amazonaws.com/lists.disconnect.me/simple_malvertising.txt" ;
+  curl -sSf "https://v.firebog.net/hosts/Prigent-Crypto.txt" ;
+  curl -sSf "https://bitbucket.org/ethanr/dns-blacklists/raw/8575c9f96e5b4a1308f2f12394abd86d0927a4a0/bad_lists/Mandiant_APT1_Report_Appendix_D.txt" ;
+  curl -sSf "https://phishing.army/download/phishing_army_blocklist_extended.txt" ;
+  curl -sSf "https://gitlab.com/quidsup/notrack-blocklists/raw/master/notrack-malware.txt" ;
+  curl -sSf "https://raw.githubusercontent.com/Spam404/lists/master/main-blacklist.txt" ;
+  curl -sSf "https://raw.githubusercontent.com/FadeMind/hosts.extras/master/add.Risk/hosts" ;
+  curl -sSf "https://urlhaus.abuse.ch/downloads/hostfile/" ;
+#  curl -sSf "https://v.firebog.net/hosts/Prigent-Malware.txt" ;
+#  curl -sSf "https://v.firebog.net/hosts/Shalla-mal.txt" ;
+
+) |
+  cat |                # Combine all lists into one
+  grep -v '#' |        # Remove comments lines
+  grep -v '::' |       # Remove universal ipv6 address
+  tr -d '\r' |         # Normalize line endings by removing Windows carriage returns
+  sed -e 's/0\.0\.0\.0\s\{0,\}//g' |     # Remove ip address from start of line
+  sed -e 's/127\.0\.0\.1\s\{0,\}//g' |
+  sed -e '/^$/d' |                       # Remove empty line
+  sort -u |                              # Sort and remove duplicates
+  awk '{print "local-zone: " ""$1"" " always_nxdomain"}' # Convert to Unbound configuration
+