Fix the build without botan, caused by credentials_manager

Verify TLS certificate with the given hostname, instead of a hardcoded one

Fix the initial IRC nickname (was using realname, by mistake)

Verify the remote TLS certificates using the system-wide trusted CAs

Fix the logger test when built without systemd

Add a IoTester class

Do not forget to implement a method

Remove a useless assignment

Implement a basic webirc support

See https://kiwiirc.com/docs/webirc

fix #3135

Fix the double sending of the USER command

Remove some useless includes

Run the database tests with an in-memory sqlite db

Add a few tests

Only run “make coverage” in one CI build

Remove the build+test script, just specify everything in the CI file

Add a .gitignore file

Only download Catch when the test_suite target is built

Remove a write to std::cout from Database’s constructor

Make lcov gcov etc optional

make coverage will display an error instead

make coverage is only available with a debug build