The daemon dies on failing requests

How to reproduce

• Configure a unresolvable hostname (eg. not-found.lan)
• Disable the ambient light check, or run in a dark environment
• Move into the motion detection circle
• See the curl request failing (AVM: req_get_wr::curl_easy_perform() failed (Couldn't resolve host name))
• See the daemon shutting down

Acceptance criteria

• The daemon should never quit, only on the correct signals

Tasks

• Remove all exit(); calls from non-binary locations