- Do not depend on strace, it is not really needed

- Add patch to build with current pycountry:
* pycountry.patch

- Drop not needed lxml-doc dependency

- Avoid mixing historic and modern option syntax for tar.
- Replace find -exec rm by just find -delete.

- Correct the Source URL

- Make sure the documentation is generated properly
- Enable testsuite
- Add patches from debian for tests to pass:
* sphinx-intersphinx.patch
* test-pytest310.patch
* xliff-xsd-no-network.patch

- Update to 2.3.1:
* But fixes.
* INI: Enabled support for Python3 provided.
* Use backports.csv module on Python 2 to align the behavior
with Python 3 and drop many hacks.
* Removed deprecated getoutput, add new depreceations.
* Code cleanup; many converterters refactored.