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Would be possible to have any features from systemd 231 in RedHat
7?  specially InaccessiblePaths, ReadOnlyPaths
The other ones mentioned here are also important http://blog.tomecek.
net/post/linuxcon-containercon-europe-2016/ to secure services
runnning in RedHat 7.

InaccessiblePaths and ReadOnlyPaths already exist as InaccessibleDirectories and ReadOnlyDirectories. They have been renamed in the later versions. Please, be specific about the other features that you want us to implement.