(This is still a work-in-progress)
As of 2019-04-02 the following PR is has been merged into master which implements channel backups
See also https://twitter.com/alexbosworth/status/1112857863393763329
SCB has been merged into the lnd master branch:
lightningnetwork/lnd#2313 …
It allows for a small backup file to be made to recover a
data-lost channel's funds with peer cooperation. The file