This module clears all channel buffers whenever the user does something. This
means that channel buffers will only be cleared after we are 100% sure they were
read. Yay for no longer losing buffer playback when the client breaks.
git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@2107 726aef4b-f618-498e-8847-2d620e286838
