smf(5): last_import should be changed to last-import
manpage - manual pages
The last_import should be changed to last-import here in the smf(5) man page:
last_import Configuration as prescribed by the manifest of the service that is taken during svccfg(1M) import operation. This snapshot provides a baseline for determining property customization.
The last-import is used in the sources for more than 10 years now: