TODO: drop entry about renaming

TODO: drop entry about renaming

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
f2ef8b28a5266a0070b0cb8b6375e418a5300975, 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.