[#90] Resolve "Drop support for multiple subadressing"
Closes #90
- Changed EMAIL_RECIPIENT_REGEX to support both notifications+channel.level@whatever.cern.ch AND notifications+channel+level@whatever.cern.ch
- Moved the whole address specified in
email_template/simple_notification.htmlerror mail into config EMAIL_GATEWAY_ADDRESS. - Moved the string with SNOW url specified in
email_template/simple_notification.htmlerror mail into config EMAIL_GATEWAY_OPENTICKET.