Enable systemd socket activation (if available)

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
Add basic systemd scripts

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
A small typo

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
A leftover

Signed-off-by: Peter Lemenkov <lemenkov@gmail.com>
Merge pull request #2 from lemenkov/systemd_socket_activation

Enable systemd socket activation (if available)