- Patch #992564 by wojtha: t() or format_plural() inside watchdog() function call in tracker and action module.

#331951 by aspilicious, sun, jhodgdon, Morbus, et al: Figure out and apply coding standard for casting.

#306540 by halstead, Dave Reid, jvandyk, eMPee584: Fixed Orphaned assigned actions still triggered and cannot be removed.

- Patch #721010 by jhodgdon: actions topic group needs more functions included and better doc header.

#356074 by chx and Damien Tournoud: Provide a sequences API. Gets rid of stupid tables that only contain an incrementing ID, and fixes database import problems due to user ID 0.

- Patch #306611 by jbomb, sun | Damien Tournoud: fixed fatal error when trying to invoke non-existing action callbacks.

- Patch ##525540 by jvandyk, sun, jhodgdon, fago | webchick, TheRec, Dave Reid, brianV, sun.core, cweagans, Dries: gave trigger.module and includes/actions.inc an API overhaul.  Simplified definitions of actions and triggers and removed dependency on the combination of hooks and operations. Triggers now directly map to module hooks.

- Patch #245115 by kkaefer, John Morahan, JohnAlbin et al: after a long discussion we've decided to make the concatenation operator consistent with the other operators.

#203846 by pwolanin and jvandyk: PHP 4 does not allow omitting an object when it is passed by reference, so we need to live with dummy object passing with actions for object-less actions to support PHP 4

 - whitespaces at end of lines
 - indentation
 - control structure usage
 - whitespace in empty lines
 - phpdoc comment formatting

#194149 reported by hswong3i, in patch form by Rob Loach: action loading was using improper variable and property names

Four watchdog() calls which still used t(), identified by myself after implementing extraction code for Drupal 6 at #182765

#174170 by Shiny: different method to insert an action row with default values, so it works with PostgreSQL too