After the mechanical change in fcb8d040e8
("treewide: use Software Package Data Exchange (SPDX) license identifiers"),
a few stray license blurbs or fragments thereof remain. In two cases
these were extra blurbs in code generators intended for the generated code,
in others they were just missed by the script.
Clean them up, adding an SPDX license identifier where needed.
Closes#10072
In an upcoming commit I will add "system.describe_ring" table which uses
endpoint's inet address as a part of CK and, therefore, needs to keep them
sorted with `inet_addr_type::less`.
