- Add reproducible.patch to override build date (boo#1047218)

- Create subpackages for opensearch and woffle as they have
different dependencies, with opensearch disabled due to
dependencies not in factory
- Fix elvi phpdoc which wasnt executable
- Add missing dependencies
- Activate the tests. While they mostly fail due to no internet,
they are useful to spot missing dependencies.
- Remove two elvi which depend on apt-cache, suited for Debian systems
- Remove /etc/xdg from directories owned by this package
- Add test-show-failing-url.patch for debugging purpose