This way, TCPSocketHandler only deal with the message sending/receiving, not
the connect() or anything else. This will be used for implementing servers
(because when a client is accepted, we don’t need all the connect() and dns
resolution stuff).
Fix test encoding by setting LANG and LC_ALL to C.UTF-8
Because we don’t want to rely on each projet setting their own variable LC_ALL and LANG in gitlab’s CI preferences.
See merge request !4