[PATCH 2/2] fs-snapshot: btrfsctl is obsolete, use btrfs. BZ 1010974

[Zdenek Pavlas]

>  I'd much prefer to have some way for the plugin to select which code
> path to use (old or new) based on which of the btrfs/btrfsctl commands
> exist.

It supported both but btrfsctl was marked as deprecated in man pages
(just checked on F17). Since F19 the btrfsctl binary is gone- so we
don't need two code paths, I guess.