Adds time zone name localization options and fixes problems on systems
that don't support GNU C time zone mappings (#1177067).
- Use default color theme in logout_error function when possible.
+ - Fixes for increased error checking in PHP 5.1 array_shift() (#1237160).
+ - Added extra checks in delivery class for In-Reply-To header. Fixes
+ E_NOTICE level warnings in php 5.0.4 and later (#1206474). [php5]
+ - Added extra checks in SquirrelMail charset_encode() function in case
+ somebody removed html to us-ascii conversion library (#1239782).
Version 1.5.0 - 2 February 2004
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