Add change notice and update simplenews_mail() documentation

I am not sure what statistics module you're talking about.

There is http://drupal.org/project/simplenews_statistics but this never was part of this project.

There have been API changes in alpha1 -> alpha2 (It's alpha after all) so if you're using the above module then it probably needs to be updated.

Had a quick look at the above module and it's kinda obvious that it doesn' work anymore. The process of sending mails has been completely re-worked and needs to be updated.

The main problem is this and the related lines of code:

if ($message['module'] == 'simplenews' && $message['params']['context']['category']->format =='html') 

Instead of the different context things like account, node and category, there is now only the source object passed through.

See http://api.worldempire.ch/api/simplenews/includes--simplenews.mail.inc/f... and http://api.worldempire.ch/api/simplenews/simplenews.module/function/simp.... (And yes, documentation needs to be updated there)

If you are using the mentioned module, then please move the issue over to that project.

Ok, thanks.

When you do something like this, please always reference newly created issues in both ways by adding "[#issue]", this will then automatically be converted into a link: #1390184: Port current D6 release to D7.

Changing this issue to a task to improve our documentation about that change.

The attached patch updates the mentioned documentation issues

Change notice at http://drupal.org/node/1390222.

Updated patch also contains the missing hook documentation and a fixed class reference.

Ok, commited.