Create directory for log file during installation. Fail daemon if unable to open log file.
Refactored default place of configuration files directory is used during starting executables. Now it contructs from --prefix.
Clear clients at server shutting down. There was a crash.
Merge branch 'master' of https://github.com/treww/freeopcua
Reverted revions with mutex for publish queue at server and separate thread for publish respons at client.