Add script to create the acl files for squid

Importing these files into squid and creating the relevant
upstream proxies is left as an exercise for the user!

scripts/create-squid.sh

@@ -0,0 +1,68 @@
+#!/bin/bash
+basedir=".."
+outputdir="output/squid"
+path="${basedir}/cache_domains.json"
+REGEX="^\\*\\.(.*)$"
+
+export IFS=' '
+
+test=$(which jq);
+out=$?
+if [ $out -gt 0 ] ; then
+        echo "This script requires jq to be installed."
+        echo "Your package manager should be able to find it"
+        exit 1
+fi
+
+cachenamedefault="disabled"
+
+while read -r line; do
+        name=$(jq -r ".cache_domains[\"${line}\"]" config.json)
+        declare "cachename${line}"="${name}"
+done <<< $(jq -r '.cache_domains | to_entries[] | .key' config.json)
+
+rm -rf ${outputdir}
+mkdir -p ${outputdir}
+while read -r entry; do
+        unset cachename
+        key=$(jq -r ".cache_domains[$entry].name" $path)
+        cachename="cachename${key}"
+        if [ -z "${!cachename}" ]; then
+                cachename="cachenamedefault"
+        fi
+        if [[ ${!cachename} == "disabled" ]]; then
+                continue;
+        fi
+        while read -r fileid; do
+                while read -r filename; do
+                        destfilename=$(echo ${!cachename}.txt)
+                        outputfile=${outputdir}/${destfilename}
+                        touch ${outputfile}
+                        while read -r fileentry; do
+                                # Ignore comments
+                                if [[ ${fileentry} == \#* ]] || [[ -z ${fileentry} ]]; then
+                                        continue
+                                fi
+				# Handle wildcards to squid wildcards
+                                parsed=$(echo ${fileentry} | sed -e "s/^\*\./\./")
+				# If we have cdn.thing and *.cdn.thing in cache_domains
+				# Squid requires ONLY cdn.thing
+				if [[ ${fileentry} =~ $REGEX ]]; then
+					grep "${BASH_REMATCH[1]}" ${basedir}/${filename} | grep -v "${fileentry}" > /dev/null
+					if [[ $? -eq 0 ]]; then
+						continue
+					fi
+				fi
+
+                                echo "${parsed}" >> "${outputfile}"
+                        done <<< $(cat ${basedir}/${filename} | sort);
+                done <<< $(jq -r ".cache_domains[${entry}].domain_files[$fileid]" ${path})
+        done <<< $(jq -r ".cache_domains[${entry}].domain_files | to_entries[] | .key" ${path})
+done <<< $(jq -r '.cache_domains | to_entries[] | .key' ${path})
+
+cat << EOF
+Configuration generation completed.
+
+Please copy the following files:
+- ./${outputdir}/*.txt to /etc/squid/domains/
+EOF