New cxs v13.01

Changes:

• Added command to remove pure-ftpd configuration from local pure-ftpd cPanel config file. This will only affect upgrades from pre v13.0. If the upgrade to 13.00 has already been done, then this will have to be done manually using the root shell command:
  sed -i “/^CallUploadScript/d” /var/cpanel/conf/pureftpd/local
• Fixed –threads [auto] calculation on servers with 4 or fewer CPUs