Do not use the logger before the configuration has been loaded first

Update the changelog by adding (all?) the changes in 3.0

Mark some more cmake variables as advanced

Fix the timeout test, now that we don't wait 1ms too much everytime

Do not add 1ms to the timeout of our poller

Can’t remember why I did this, but that must be a stupid reason. Everything
must work even with a timeout of 0.

Always remove all the DNS sockets on an c-ares event

Because c-ares may close one of its socket, even if it’s not the one that
has the event. Otherwise we may not know when a socket has been removed from
our poller (automatically, when close()ed) and this leads to bugs.

Revert "Don’t use unique_ptr to store dns socket handlers"

This reverts commit 5328d0806fdc5becb9344b4d4320787a2b7c0712.

Test the resolving of multiple hostnames at the same time

Use log_error instead of cerr

Refactor the CI file, build many configurations

In reload.cpp, only build the database things if litesql is used

Always build the artifacts

Properly use the docstring variables

Clean the list of options visible in non-advanced ccmake

Use an ugly way, because SOURCES property does not work in cmake 3.0

Bring back DNSSocketHandler's destructor

Set the required cmake version to 3.0

Don't use target_sources() in cmake because it's >=3.1 only

Don’t use unique_ptr to store dns socket handlers

Move reload.*pp from louloulibs to src