Replace print to stderr by standard logging

Also log the actual traceback when _run_as_daemon raises an exception
Don't hardcode 'ocsmanager.ini' as the config file

We can now have a development.ini without touching the packaged config file
Use HTTP/1.1 instead of 1.0

HTTP/1.0 just doesn't work with NTLMAuthHandler,
or at least it is not possible to use curl + HTTP/1.0 to test ocsmanager.
Revamped development.ini
Sleep when waiting for NTLMAuthHandler socket
Fix client_id deletion and _read_environment logs
Handler KeyError in ntlm_env_setter
Unquote body before passing it to ElementTree
Use SamDB.domain_dn instead of home rolled stuff