Number of issues for Abo
Some abonnements get more than one issue. EDRi for example should get 15. Instead of putting 15 abonnements into the database it would be nice to just have a field specifying how many issues will be delivered.
- For printing address labels this would have to be interpreted and accordingly as many address labels have to be printed as necessary for sending as many DSen
- Counts about how many receivers we have need to take this into account (number of recipients != number of sent DSen from then on!)
- Currently doubled entries in the database should be consolidated