Convert domain names to lower case before checking validity of the domain

advanced/Scripts/list.sh

@@ -51,8 +51,11 @@ EOM
 }
 
 HandleOther(){
-  #check validity of domain
-	validDomain=$(echo "$1" | perl -ne'print if /\b((?=[a-z0-9-]{1,63}\.)(xn--)?[a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,63}\b/')
+	# First, convert everything to lowercase
+	domain=$(sed -e "y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/" <<< "$1")
+
+	#check validity of domain
+	validDomain=$(echo "$domain" | perl -ne'print if /\b((?=[a-z0-9-]{1,63}\.)(xn--)?[a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,63}\b/')
 	if [ -z "${validDomain}" ]; then
 		echo "::: $1 is not a valid argument or domain name"
 	else