v3.4

Changelog:

• provide hotrestore and hotrestore-config features #60
• Provide a systemd service instance [email protected] #68
• error when evaluating contextcsn #70
• Exit after finding version with slapd binary #75

See also https://github.com/ltb-project/slapd-cli/milestone/13

Thanks to contributors:

• @coudot
• @davidcoutadeur