I was getting random SEGVs when disconnecting from the VNC server.  I 
tracked it down to the fact that if you remove a IOHandler from another 
IOHandler, all sorts of badness may result as you're removing entries 
from a linked list while transversing it.

My solution is to simply add a deleted flag to each entry and walk the 
list a second time.  During the second transversal, we'll remove nodes 
that need removing.

Haven't seen the SEGV since I started using this patch.

Regards,

Anthony Liguori