mbuffer is both in Base:System and network:utilities (I maintain the latter), with openSUSE:Factory linking the one from Base:System.
Could we merge those ? (replace everything with _link except one ;)).
There are no maintainers defined for Base:System/mbuffer (and Base:System is half of this mailing-list ;)), which is why I'm sending the mail here and not to the maintainer(s).
On a side note, there is a much more recent version in network:utilities as compared to Base:System and Factory (13 upstream releases in-between, with bugfixes and more features).
If no one minds, I would suggest linking Base:System/mbuffer to network:utilities/mbuffer