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663d75e7a0
Due to master-worker rework, daemonization fork happens now before parsing and applying the configuration. This makes impossible to report correctly all warnings and alerts to shell's stdout. Daemonzied process fails, while being already in background, exit code reported by shell via '$?' equals to 0, as it's the exit code of his parent. To fix this, let's create a pipe between parent and daemonized child. The child will send into this pipe a "READY" message, when it finishes his initialization. The parent will wait on the "read" end of the pipe until receiving something. If read() fails, parent obtains the status of the exited child with waitpid(). So, the parent can correctly report the error to the stdout and he can exit with child's exitcode. This fix should be backported only in 3.1.