allow empty string for ircddb0_host

qnconfig

@@ -265,7 +265,14 @@ IrcddbMenu () {
 
 		if   [[ "$key" == l*  ]]; then ircddb_login="${value^^}"
 		elif [[ "$key" == ha* ]]; then
-			if [[ "$value" =~ ^[a-zA-Z0-9]+\.[a-zA-Z0-9]+\.[a-zA-Z0-9]+$ ]]; then
+			if [ -z "$value"]; then
+				if [ -z "${ircddb1_host+x}" ]; then
+					ircddb0_host=''
+				else
+					echo "You cannot set an empty value for ha unless hb has its default value"
+					read -p "<Enter> to continue: " garbage
+				fi
+			elif [[ "$value" =~ ^[a-zA-Z0-9]+\.[a-zA-Z0-9]+\.[a-zA-Z0-9]+$ ]]; then
 				ircddb0_host="$value"
 			else
 				clear
@@ -716,7 +723,7 @@ while [[ "$ans" != q* ]]
 do
 	clear
 	echo
-	echo "           QnConfig Main Menu V#210207"
+	echo "           QnConfig Main Menu V#210213"
 	echo
 	echo -n "a : Module A                - "; if [ -z $module_a ]; then echo "<EMPTY>"; else echo "${module_a^^}"; fi
 	echo -n "b : Module B                - "; if [ -z $module_b ]; then echo "<EMPTY>"; else echo "${module_b^^}"; fi