from go-netssh changelog:
dial: better error handling if ssh command exits with non-zero exit status
SSHError.Error() relied on go-rwccmd behavior of returning io.EOF if the
ssh binary exited with status code 0.
We no longe ruse go-rwccmd => capture Stderr ourselves using zrepl's
circlog (depending on zrepl is not pretty, but since this package is supposedly
only used by zrepl ATM, this is fine)
refs https://github.com/zrepl/zrepl/issues/237
* stack-based execution model, documented in documentation
* circbuf for capturing hook output
* built-in hooks for postgres and mysql
* refactor docs, too much info on the jobs page, too difficult
to discover snapshotting & hooks
Co-authored-by: Ross Williams <ross@ross-williams.net>
Co-authored-by: Christian Schwarz <me@cschwarz.com>
fixes#74
