tigefa4u projects Trac

Synchronise with trunk.

Synchronise with trunk.

TracMercurial for 0.12: don't crash when used together with Trac 0.11

TracMercurial 0.11: ported r6491 from the 0.12 branch

TracMercurial for 0.12: `normalize_rev` must be prepared to handle integers.

The !RevisionLogModule module for example can trigger such situations.

Diff Tabular/Inline switcher: some diff divs may have no diff table (e.g. property changes only)

MultipleRepositorySupport: more bug fixes
- `RepositoryManager.get_repository` may try to get a repository for which the backend was not loaded
- `username` attribute needed in the `MockPerm` class
- fix rendering of `changeset:` links when there's no reponame specified
- add a few missing `reponame` in changeset resource specifications

Changed:
- links to missing changesets simply have no href attribute
- `export:/path` links should actually refer permanently to the ''latest'' revision of the node, not to the latest at the time the link was created

MultipleRepositorySupport branch synced with trunk [6425:6486/trunk]

Clean up files from translations that are not used anymore.

Another TracAdmin `hotcopy` fix: fail with a nicer error message when the destination for `hotcopy` already exists.

Also, make sure that aborts due to !TracError exceptions also result in a non-zero exit code.

Should put #3198 to a rest...