If a channel was manually disabled, subsequent automatic / background
requests to update that channel's state will be ignored. A RequestAuto
call restores automatic / background state management and indicates
that such requests should no longer be ignored.
Add a new boolean parameter without changing any existing
functionality. The parameter will be used to indicate
whether a request to update a channel's status was made
manually by a user (currently always false).
Modifies the netann.ChanStatusManager to remove outpoints
from the set of tracked channels when it encounters a
channeldb.ErrEdgeNotFound when passively disabling. It is
possible for this to occur if a channel is closed w/o first
being disabled, which may happen if the remote party force
closes.
