pimsync: ensure local storage directories exist
Unfortunately pipsync will throw an error if it trys to write into a
nonexistant local storage directory. This patch ensures that all local
storage directories are present for accounts with pimsync enabled.
* pimsync: use tmpfiles to create storage dirs
* pimsync: fix tests
* pimsync: only use tmpfiles on linux
* pimsync: format
* pimsync: use mkdir to create storage dirs if systemd is not available
This includes the calendar/contacts prefix in the storage name as well
as the pair name to ensure that if the same name is used for contacts
and calendar then it is correctly referenced.
