Zfs-autobackup

Some **major** changes in this version:

* Mounting is now more consistent after initial dataset transfer: Previously newly received datasets would never be mounted. In this version a dataset will be mounted according to the same logic as a zfs mount -a. 112 Also see https://github.com/psy0rz/zfs_autobackup/wiki/Mounting
* Empty parent datasets that are created will now have canmount=off. Previously they would be created with on.
* The guid of common snapshots is now checked, and mismatching ones can be destroyed by --destroy-incompatible. (218)
* --rollback is now only run at the start of an actual transfer. 217 (previously all target datasets where rolled back always when --rollback was specified)
* 264: Snapshot exclude patterns
* Reduced verbosity and improved output.
* A bunch of other bugfixes and improvements.

Note that we now have a v3.4 branch that has some major internal improvements to prepare for bookmarks and other features. Please test that version as well if you're daring :)

Some **major** changes in this version:

* Mounting is now more consistent after initial dataset transfer: Previously newly received datasets would never be mounted. In this version a dataset will be mounted according to the same logic as a zfs mount -a. 112 Also see https://github.com/psy0rz/zfs_autobackup/wiki/Mounting
* Empty parent datasets that are created will now have canmount=off. Previously they would be created with on.
* The guid of common snapshots is now checked, and mismatching ones can be destroyed by --destroy-incompatible. (218)
* --rollback is now only run at the start of an actual transfer. 217 (previously all target datasets where rolled back always when --rollback was specified)
* Reduced verbosity and improved output.
* A bunch of other bugfixes and improvements.

* --help output is split up in nice sections now.
* Moved documentation to wiki and split it up.
* Created zfs-check, a tool to generate checksum streams of zfs datasets, to compare datasets with eachother. (Will be used in conjuction with zfs-autoverify)
* Started working on an zfs-autoverify tool to actually verify your backups. (this took some refactorring and extracting common code to a ZfsAuto baseclass) Still work in progress.
* Allow non-recursive selection of datasets by setting autobackup:name=parent. (usefull for /var/lib/docker)

* --help output is split up in nice sections now.
* Moved documentation to wiki and split it up.
* Created zfs-check, a tool to generate checksum streams of zfs datasets, to compare datasets with eachother. (Will be used in conjuction with zfs-autoverify)
* Started working on an zfs-autoverify tool to actually verify your backups. (this took some refactorring and extracting common code to a ZfsAuto baseclass) Still work in progress.