[ngIRCd-ML] How to get all users?

Since some days I have a ghost user connected to my server. The list users command always returns one user more than I can count on the channels. Is there any way (including code changing and recompiling) to find out where that connection comes from? Yours Jens -- "I'm a wizard! We can see things that are really there, you know," said Ridcully. "And in the case of the Bursar, things that aren't there, too." (Terry Pratchett - Hogfather)