- Renamed some test files for consistency.
  - All tests under t/ were made available on Travis-CI & GitLab CI.

- `sympa.conf-dist` always contains all available configuration settings,
  letting admins copy those they want in `sympa.conf`;
- it’s generated at `make`, getting the settings from `Sympa::ConfDef` module;
- it’s installed in `$sysconfdir` at `make install`.

- Code::TidyAll added as develop requirement in cpanfile
- Add tidyall target to Makefile.am (to run it with the good options
  without pain)
- Add dot/dot.tidyallrc
- Add t/ and xt/ to perltidy test

[change] Move task files to task/ subdirectories. Previously list_task_models/ and global_task_models/ directories were used.  Task files in older directories will be automatically copied to new places during upgrading process.

- Add cpanfile, specifying dependencies for running the xt tests
  (authors tests, not installation tests)

http://www.sympa.org/manual/ to https://sympa-community.github.io/manual/

Now smtpc is there: https://github.com/ikedas/smtpc.git

Sourcs checked out from repository lacks *.mo test files so that some tests in t/Language.t fails. Only "make dist" generated these files.

Fixed by letting check-local rule depend on test files.

[bug] "make install" did not create required spools and created spools that will be automatically created.

- Fixed by creating only spools not always created automatically.
- Changed mode of created spools (755 to 750).

- Instead, it will be installed in $bindir.

- Some platforms (at releast macOS) has only "/usr/bin/true".