* fix: cli command to unlock the autorestic running value
* fix(unlock cmd): get user confirmation in case an instance is still running
* fix(cmd unlock): add force flag
Fix#332.
This adds a new "PreValidate" hook that is executed before checking
the backup location. This allows, for example, mounting a remote
source to make the directories of the location available.
"PreValidate" is added as a new hook to avoid any breakage that might
have been caused by changing the behaviour of the "before" hook.
Documentataion updates included.
