2.2.0:
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 * Prepare for Serendipity Styx 4.4.0 - expandable hooked sidebar links

2.1.0:
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 * Fix $serendipity['db_server_info'] for removed MariaDB prefix with PHP 8.0.16+,
   to set the correct SQL utf8mb4 index key length limits on install.
   Improves on both mysql instances.

2.0.2:
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 * Fix some uninitialized variable checks for PHP 8

2.0.1:
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 * Fix parameter order changes for PHP 8
 * Fix [de] typos

2.00:
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 * Raise requirement to Styx 3.2
 * Set database INDEX key length by installed database versions (MariaDB >= 10.5 preferred)

1.31:
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 * Fix some wrong path concatenation double slashes

1.30:
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 * Replace PHP 7.2 set deprecated each() usage where possible

1.29:
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 * Restrict sql index key length for utf8mb4 migration to mysqli only

1.28:
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 * Restrict sql index key length for utf8mb4 migration

1.27:
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 * Iconfont accessibility fixes

1.26:
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 * Rewrite backend markup for Serendipity 2.0x+
   - extends required version to 2.0
 * Add backend CSS styles
 * Use lang API includement
 * Set some plugin consistencies
 * Use serendipity_db_bool() method
 * Fix <en>, <de> add category constant