1.89.2: Dont refresh timeout when displaying comment preview

1.89.1: Modified sql statement used for htaccess blocking to work in MySQL 5.7.
        Thanks to @fasterit!

1.89: Added timeout protection against spambots.
      Thanks to @stephanbrunker!

1.88.2: Don't overwrite "moderate" flags from other plugins.
        ($serendipity['csuccess'])