NamespaceId is inconsistent with our general spelling rules which say that
capitalization of acronyms should not be changed when they are concatenated in
CapitalizedCamelCase strings. But NamespaceId was added in
f2ef8b28a5, before v249, so it's too late to
change it. OTOH, NamespaceNSID cannot really be spelled in any other way.
"NamespaceNsid" would be quite bad. So let's just ignore the inconsistency in
naming, this seems to be the least bad option.
Naming is always a matter of preference, and the old name would certainly work,
but I think the new one has the following advantages:
- A verb is better than a noun.
- The name more similar to "the competition", i.e. 'sudo', 'pkexec', 'runas',
'doas', which generally include an action verb.
- The connection between 'systemd-run' and 'run0' is more obvious.
There has been no release yet with the old name, so we can rename without
caring for backwards compatibility.
