- Install tmpfiles configuration in the proper location per guidelines,
  thus solving the startup trouble due to missing directories
  (respectively BZ 1115251, 1081584, 982001, 1135696)
- Clean between builds, otherwise zabbix_{proxy,server} are compiled
  again on install; make server and proxy package noarch now
- Set the service type to forking in unit files (BZ 1132437),
  add PIDFile entry, remove RemainAfterExit, change /var/run to /run
- Correct path to traceroute in DB dumps again
- Leave database-specific datadir subdirectories to the dbfiles sub-packages
- Harmonize package descriptions and summaries