The two subs decide whether zmpkg.pl hands start/stop/restart to systemd or
runs the daemons itself, which is what keeps them out of the web server's
cgroup and mount namespace. Living in a script they could not be reached by
require_ok, so the cgroup matching had no test.
Split the matching into cgroup_in_service, which takes the text of a cgroup
file rather than reading one, and cover it: cgroup v2's single line and v1's
several, a sub-cgroup of a delegated service, a unit whose name merely starts
with ours, and empty or undef input.
The test found that the delimiter in m|/\Q$unit\E\.service(?:/|$)| ended the
match at the alternation, so the module did not compile.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019URmtYqza6Rzi6F7cmabSm
