"Starting Boot Control…" would be a fairly confusing message in the boot logs.
Use "… Service" to mirror what we have in other services like
systemd-{hostnamed,timedated,portabled,machined,…}.service.
# (at your option) any later version.
[Unit]
-Description=Boot Control
+Description=Boot Entries Service Socket
Documentation=man:bootctl(1)
DefaultDependencies=no
After=local-fs.target
# (at your option) any later version.
[Unit]
-Description=Boot Control
+Description=Boot Entries Service
Documentation=man:bootctl(1)
DefaultDependencies=no
Conflicts=shutdown.target