WIP: Switch to new config format.

Don't use jobrun for daemon, just call JobDo() once, the job must
organize stuff itself.

Sacrifice all the oneshot commands, they will be reintroduced as
client-calls to the daemon.

cmd/config.go

@@ -0,0 +1,31 @@
+package cmd
+
+import (
+	"io"
+
+	"github.com/zrepl/zrepl/rpc"
+	"github.com/zrepl/zrepl/zfs"
+)
+
+type Config struct {
+	Jobs map[string]Job
+}
+
+type RPCConnecter interface {
+	Connect() (rpc.RPCClient, error)
+}
+type AuthenticatedChannelListenerFactory interface {
+	Listen() AuthenticatedChannelListener
+}
+
+type AuthenticatedChannelListener interface {
+	Accept() (ch io.ReadWriteCloser, err error)
+}
+
+type SSHStdinServerConnectDescr struct {
+}
+
+type PrunePolicy interface {
+	Prune(fs zfs.DatasetPath, versions []zfs.FilesystemVersion) (keep, remote []zfs.FilesystemVersion, err error)
+}
+