New cxs v3.21

Changes:

• Disable Script Version Scanning for web script scanning (cxscgi.sh) as it does not apply
• Perl module Storable added to the required list
• Added ten of the most popular WordPress extensions to Script Version Scanning:
  WP Akismet Ext v2
  WP Better WP Security Ext v3
  WP Contact Form 7 Ext v3
  WP Facebook Ext
  WP Google XML Sitemaps Ext v3
  WP Jetpack Ext v2
  WP NextGEN Gallery Ext v2
  WP Seo Ext
  WP W3 Total Cache Ext
  WP WooCommerce Ext v2
• Added ten of the most popular Joomla extensions to Script Version Scanning:
  Joomla Advanced Module Manager Ext v4
  Joomla JCE Ext v2
  Joomla RAntiSpam Ext v3
  Joomla Joomla LiveHelpNow Chat Ext v2
  Joomla Rapid Contact Ext
  Joomla Asynchronous Google Analytics Ext v2
  Joomla Google Maps Ext v3
  Joomla Sourcerer Ext v4
  Joomla Tabs Ext v3
  Joomla Modules Anywhere Ext v3
• Added the following to Script Version Scanning:
  OpenCart, Nucleus CMS, Open Classifieds, LimeSurvey, ClipBucket, WHMCS, Coppermine Photo Gallery
• Exploit fingerprint definitions database additions