When there was only one client with a pending request and that client
disconnected from ZNC, we didn't destroy the timeout. This means that the
associated timer eventually fired and then tried to display which request caused
the timeout. But since we already cleaned up the rest, this resulted in a NULL
pointer dereference.
This commit fixes also another bug: If two different clients got pending
requests and the client whose request was currently handled disconnected, we
didn't send the other client's request to the IRCd.
git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@2102 726aef4b-f618-498e-8847-2d620e286838