fix logging - log the domain instead of $this->id
- add protected $domain (used for logging)
- add function domain_from_id()
- http://sourceforge.net/p/postfixadmin/bugs/317/
AliasHandler.php:
- add function domain_from_id()
MailboxHandler.php:
- add function domain_from_id()
- init(): use $this->domain instead of splitting $this-id again
git-svn-id: https://svn.code.sf.net/p/postfixadmin/code/trunk@1684 a1433add-5e2c-0410-b055-b7f2511e0802