erc-track-mode
erc-track-mode is an interactive autoloaded compiled Lisp function in `erc-track.el
'.
(erc-track-mode &optional ARG)
Toggle ERC track mode.
With a prefix argument ARG, enable track if ARG is positive,
and disable it otherwise. If called from Lisp, enable the mode
if ARG is omitted or nil.
This mode tracks ERC channel buffers with activity.