Commit 6343515fed introduced equality
instead of substring comparison for filters. This broke the buddy
filter in the case of more than one buddy, because in such a case
the buddy list is a comma-separated string.
Fix this by splitting the buddy string, trimming the individual
strings and search in the list.
Fixes#969
Reported-by: <yrevawerd@gmail.com>
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>