v0.25.2

A patch release with one fix. It supersedes v0.25.1, which was tagged but never published.

Fixed

• A clone that was never finished no longer keeps a deployment from starting. A clone that is cut short (the process stopped, the disk filled) leaves a working copy with no commit. Every start found it again and stopped, so one such folder kept the whole deployment down until someone removed it by hand. That working copy is now set aside, with whatever files were in it, and cloned again. Nothing is deleted.
• The working copy is set aside only after nothing has written to it for a minute, so a clone that is still running is left alone and used once it finishes.
• A working copy that has a commit is left exactly where it is, as before.
• A start that stops because one branch's working copy cannot be prepared now says which branch.

Upgrading

No migrations and no configuration changes. Upgrading from 0.25.0 needs nothing beyond the new image or packages.