fwupdate: FIX new firmwares with alphabetically bigger extendedno are…

… not correcly detected

release/src/router/rom/webs_scripts/merlin_webs_update.sh

@@ -32,12 +32,6 @@ current_extendno=$(nvram get extendno)
 #	current_firm_is_beta=0
 #fi
 
-# Overload extendno: alpha is 11-19, beta is 51-59, release is 100-109.
-current_extendno=$(echo $current_extendno | sed s/-g.*//;)
-current_extendno=$(echo $current_extendno | sed "s/^[0-9]$/10&/;")
-current_extendno=$(echo $current_extendno | sed s/^alpha/1/;)
-current_extendno=$(echo $current_extendno | sed s/^beta/5/;)
-
 # get firmware information
 forsq=$(nvram get apps_sq)
 model=$(nvram get productid)
@@ -113,7 +107,7 @@ else
 					fi
 				fi
 		elif [ "$current_buildno" -eq "$buildno" ]; then
-			if [ "$current_extendno" -lt "$lextendno" ]; then
+			if [ "${current_extendno}" \< "${extendno}" ]; then
 				echo "---- lextendno: $lextendno ----" >> /tmp/webs_upgrade.log
 				nvram set webs_state_flag=1	# Do upgrade
 				if [ "$IS_SUPPORT_NOTIFICATION_CENTER" != "" ]; then
@@ -138,7 +132,7 @@ if [ "$firmver_beta" != "" ] && [ "$buildno_beta" != "" ] && [ "$lextendno_beta"
 		if [ "$current_buildno" -lt "$buildno_beta" ]; then
 			get_beta_release=1
 		elif [ "$current_buildno" -eq "$buildno_beta" ]; then
-			if [ "$current_extendno" -lt "$lextendno_beta" ]; then
+			if [ "$current_extendno" \< "$extendno_beta" ]; then
 				get_beta_release=1
 			fi
 		fi