use "curl -L" to follow redirects during subdomain check

also write out http_code to avoid using grep to check for 200

Linux Script/configure-linux.sh

@@ -354,7 +354,7 @@ checkIfLogglyServersAccessible() {
 
   echo "INFO: Checking if '$LOGGLY_ACCOUNT' subdomain is valid."
   if [[ $LOGGLY_ACCOUNT != $INVALID_SUBDOMAIN ]]; then
-      if [[ $(curl --head -s --request GET $LOGGLY_ACCOUNT_URL/login | grep "200 OK\|HTTP/2 200") ]]; then
+      if [[ $(curl -L -s --head  --request GET $LOGGLY_ACCOUNT_URL/login -w '%{http_code}' -o /dev/null) == "200" ]]; then
           echo "INFO: $LOGGLY_ACCOUNT_URL is valid and reachable."
       else
           logMsgToConfigSysLog "ERROR" "ERROR: This is not a recognized subdomain. Please ask the account owner for the subdomain they signed up with."