Previously, if a match specification contained the con_id or con_mark criterion,
all other criteria were ignored. However, a user may want to specify one of
those two unique identifiers and still specify others as well, for example to
match the currently focused window, but only if it has a certain WM_CLASS:
[con_id=__focused__ class=special] kill
We now check all specified criteria.
fixes#2111
Ingo Bürk