amend: add noise in extra to avoid creating obsolescence cycle (issue3664) Obsolescence cycle are bad and should be avoided as much as possible. The current amend implemented touch changeset meta data as few as possible. This make is easy for amend to result in the same node than a precursors. We add some deterministic noise in extra to avoid this. In practice, the hex of the amended changeset is stored in 'amend_source' extra key. [ original upstream message ]

Move commands.inferrepo for code maintenance

Merge with stable

commands: don't infer repo for commands like update (issue2748) Maintain a whitelist of commands to infer the repo for instead. The whitelist contains those commands that take file(s) in the working dir as arguments. [ original upstream message ]