* Timelines

* Temporarily disable failing unit tests.

* Temporarily disable failing unit tests.

* Remove redundant comment.

* Fix get current timeline connectivity error. Fix PITR integration test.

* Format.

* Improve PITR integration test stability. Fix test_restore_on_new_cluster integration test.

* Improve _was_restore_successful timeline check.

* Add automatic timeline selection with the single 'restore-to-time' parameter.

* Disable failing unit tests.

* Fix docs.

* Revert "Disable failing unit tests."

This reverts commit b5e76662b5df4feba659c1a0863e31304daa45f1.

* Revert "Temporarily disable failing unit tests."

This reverts commit 32178148b9b8f4c6d41325f82634f0b5c584be2a.

* Revert "Temporarily disable failing unit tests."

This reverts commit b4639611360886fa0081cf3a301677e65b5c2099.

* Parameter validation improvement.

* Unit tests.