[pve-devel] resend a bunch of various pve-storage improvements (mainly related to ceph)

[Stefan Priebe]

This is also a resend of patches from march.

1.) They workaround some strange error handling or output of librbd
2.) They allow linked clones for ceph

[PATCH 1/7] ceph/rbd: has a pretty strange error handling - install
[PATCH 2/7] fix ' escaping of $snap parameter
[PATCH 3/7] pass snapname to vdisk_clone and plugin clone_image
[PATCH 4/7] Storage Plugins: extend clone_image by snap parameter
[PATCH 5/7] rbd: unprotect snapshots before deletion
[PATCH 6/7] RBD: enable clone of snaps
[PATCH 7/7] RBD: snap purge does not support automatic unprotect so