This bundle holds optional files that are loaded in certain situations by kernel code (if available). While this code is still in development and the use is experimental, it is stored outside the format so that there can be intermediate releases not affecting the production use of LaTeX. Once the code is finalized and properly tested it will eventually move to the kernel and the corresponding file in this bundle will vanish. Note that none of these files are directly user accessible in documents (i.e., they aren't packages), so the process is transparent to documents already using the new functionality.
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.