cgroup,setup: make CGROUP_PATH optional #87
Merged
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Some users of bst are still stuck on cgroups v1, and 588d370 ("cgroup,setup: set CGROUP_PATH in setup program with full path to current cgroup") broke the basic, non-cgroup use of bst.
This commit makes the failure to determine the current cgroup path non-fatal; the setup program has the responsibility to fail if it needs it.