Release 1.2.0

Add option to anonymize the mail log
Examples:

direct anonymization:

module.tx_maillogger.cleanup {
  anonymize = 1
  anonymizeAfter = 0
}

anonymize after x days:

module.tx_maillogger.cleanup {
  anonymize = 1
  anonymizeAfter = 30 days
}

do not anonymize at all

module.tx_maillogger.cleanup {
  anonymize = 0
}