fixes #3971

git-svn-id: svn://develop.studip.de/studip/trunk@29053 c5b85792-5220-0410-ad23-ed5b6b8ad999
exclude participants from distribution re #4063

git-svn-id: svn://develop.studip.de/studip/trunk@29054 c5b85792-5220-0410-ad23-ed5b6b8ad999