Notable changes

Bug Fixes:

• Stats page links were incorrect
• possible DB corruption when logging in with linked account
• fixed slow query in expire-quarantine.pl
• wrapped perl scripts with a pid file check

Enhancements:

• Improved security protections against CSRF attacks
• maiadbtool.pl enhancements:
  • add linked accounts, from command line, file, or LDIF file
• Added LDAP TLS option
• Interface improvements
  • some "ajax" action on the message viewer, you don't lose your work on the list underneath.
  • view and collapse header information, and message part groupings
  • Desert Sand theme switched to "Single checkbox" view instead of 3 radio boxes
  • Improved html filtering using the ​HTMLPurifier library. Installation of HTMLPurifier is simple with two commands to pear. This improves security against Cross Site scripting attacks