2.18.1: Hotfixes for PHP 8 (surrim)

2.18: Iconfont a11y fix (yellowled)

2.17:

    * Fix 2.x version checks
    * Adapt backend for 2.x
    * extend required version

2.16: fix a php dulicating method compat error

2.15:

    * prepare for Serendipity 2.0 and check for (window.Spawnnuggets)
    * fix 'show_multi' option non-template file fatal error
    * db table set to use UTF8 on install
    * extend required version

2.14.1: use serendipity_specialchars

2.14: fixed $serendipity['author'] to be $serendipity['serendipityUser'];

2.13: Use SQL RANDOM() instead of RAND() for db type, except mysql

latest: Smarty3 forward compatibility

2.0:

    * Add ability to include page blocks and page templates.
    * Blocks can be shown randomly on the interface panel, templates can be
      used for new entries.
    * Each block can use a different template.
    * You can attach special blocks to an entry individually. (Garvin Hicking)