PHP8.5 support

[Fraenkiman]

See:
https://github.com/php/php-src/blob/php-8.5.0RC2/NEWS
https://wiki.php.net/rfc/deprecations_php_8_5
https://php.watch/versions/8.5
https://www.php.net/index.php#2025-10-09-2

• The finfo_close() function has been deprecated.
  [20-Nov-2025 22:30:06 UTC] PHP Deprecated: Function finfo_close() is deprecated since 8.5, as finfo objects are freed automatically in admin\panels\uploader\admin.uploader.php on line 260
  

  flatpress/admin/panels/uploader/admin.uploader.php

  Line 259 in b0349f6

  if ($finfo) { @finfo_close($finfo); }

• The imagedestroy() function has been deprecated.
  [20-Nov-2025 22:22:59 UTC] PHP Deprecated: Function imagedestroy() is deprecated since 8.5, as it has no effect since PHP 8.0 in admin\panels\uploader\admin.uploader.php on line 352
  

  flatpress/admin/panels/uploader/admin.uploader.php

  Line 352 in b0349f6

  imagedestroy($image);

  
  

  flatpress/admin/panels/uploader/admin.uploader.thumb.php

  Lines 95 to 96 in b0349f6

  	imagedestroy($scaled);
  	imagedestroy($image);

./fp-plugins/captcha/antispam.php:@imagedestroy($image);

• The curl_close() function has been deprecated.
  [20-Nov-2025 22:10:54 UTC] PHP Deprecated: Function curl_close() is deprecated since 8.5, as it has no effect since PHP 8.0 in fp-includes\core\core.utils.php on line 630

flatpress/fp-includes/core/core.wp-functions.php

Line 87 in b0349f6

curl_close($handle);

flatpress/fp-includes/core/core.utils.php

Line 630 in b0349f6

curl_close($ch);

• Php8.5 support smarty-php/smarty#1138