Merge branch 'develop'

* develop:
  Update script header information
  Small email format issue
  Feature to remove expired iptables rules complete.
  Debug process complete for identifying iptables rules that can be removed.  All needed now is actual iptables command to remove the rules.
Fix issue with cleanup email send when no cleanup performed
Merge branch 'hotfix/Do_not_send_email_on_cleanup_when_nothing_cleaned_up' into develop