osmo-service-respawn: Add a shell script that spawns and respawns services

Adjust the oom_score_adj of the shell script to avoid ever beeing
killed. Adjust the score of the child and nice it. Sleep a given
interval before respawning it.

This script creates a .pid file so it can be used by a sysv init
script to stop the respawner and the client.
2 files changed