-With @option{-k} (@env{$REDO_LOGS=1}) option you can capture job's
-@code{stderr} on the disk and read it later with @command{redo-log}
-command. Log's lines have @url{http://cr.yp.to/libtai/tai64.html,
-TAI64N} timestamp. You can decode it with @command{tai64nlocal} utility
-from @url{http://cr.yp.to/daemontools.html, daemontools}, or similar
-one: @code{go get go.cypherpunks.ru/tai64n/cmd/tai64nlocal}.
-@option{-s} (@env{$REDO_SILENT=1}) omits @code{stderr} printing at
-all, but you can still capture it with @option{-k}.