tigefa4u projects Trac

MultiRepos: as changesets can be present in multiple repositories, the timeline event shows the list of repositories where the corresponding changeset can be found.

MultiRepos: make it possible to work without a default repository (i.e. when `[trac] repository_dir` is empty)

MultiRepos: add more TracAdmin `repository` management subcommands

- `add`/`remove`/`rename` a repository
- create an `alias` to an existing repository
- `list` existing repositories and aliases

Patch written by Remy Blank on #7822.

MultiRepos: fix changeset view option panel, integrate `reponame` in the paths

MultiRepos: move `diff_options_fields(diff)` out of macros.html into diff_options.html snippet.

MultiRepos: fix a few changeset related links

MultiRepos: add sync command (i.e. resync without initial clean-up).

This is very useful for resuming a resync that has been interrupted, without restarting it all over.

MultiRepos: make it possible to retrieve a Repository by its directory, using `RepositoryManager(env).get_repository(dir)`.

This will simplify the writing of hooks, which can simply specify the repository directory (with the scope if needed), usually readily available inside the hook.

As an example, I've modified the trac-post-commit-hook.cmd to use the `repository notify` command and to take advantage of the above feature.

MultiRepos: during notification, warn if specified reponame could not be related to any real repository.

MultiRepos: fix the youngest_rev property of the !CachedRepository