tigefa4u projects Trac

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

MultiRepos: fix the youngest_rev property of the !CachedRepository

MultiRepos: added initial support for multiple cached repositories.

- introduction of a new ''repository'' command in TracAdmin
- `resync` subcommand is now `repository resync`
- new subcommand `notify` for new changeset notification
- the `RepositoryManager` now makes a distinction between "real" repositories and mere aliases to real repositories. Only real repositories get notified of new changesets and get resynced.
- a `Repository` can now report its actual base, if it's a scoped repository. This enable to identify different scoped repositories sharing the same base. Note that a scoped repository is a real repository and if its type requires it (e.g. svn), it will get cached on its own.

Note also that '''a schema upgrade is needed''' (database_version = 22).
The `node_change` and `revision` tables gain a new `repos` column of type text.

Patch written by Remy Blank on #7723.
Review, nit-picking and summary by me.

MultiRepos: merged from 0.12dev [7949:7958/trunk]

0.12dev: manual merge of the ChangeLog

0.12dev: block [7954,7956] from being backported from 0.11-stable

MultiRepos: clean-up changeset.html by shortening lines

0.11-stable: Moving branch back into dev mode

Tagging trac-0.11.4rc1

0.11-stable: Preparing to release 0.11.4rc1