modusers: fix if not configuration is found & passwd.mod not writable for all (refs #2023)

git-svn-id: file:///var/svn/freetz/trunk@10097 149334a1-2f27-0410-a3b9-fc62619ac1e6
tinc: add to external services (refs #2018)

git-svn-id: file:///var/svn/freetz/trunk@10098 149334a1-2f27-0410-a3b9-fc62619ac1e6