Fix extended search
- Must/should not respected when federating
(from redmine: issue id 94, created on 2018-01-22tgradl, closed on 2018-01-22)
- Relations:
- relates #69 (closed)
- Must/should not respected when federating
(from redmine: issue id 94, created on 2018-01-22tgradl, closed on 2018-01-22)