dev-handbook: Remove reference to kgdb in EOL FreeBSD
kgdb exists in the base system only in FreeBSD 11 and earlier, which is
well past EOL. Remove the reference, leaving only a reference to the
kgdb port or package from devel/gdb.
Sponsored by: The FreeBSD Foundation
GSoC: Add policy on LLM usage
Add policy for contributor use of Large Language Models with Google
Summer of Code projects.
Reviewed by: imp, fuz (prior iterations)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D54789
Extend security-officer keys for another couple years.
Certify key until 2030 (planning to move to a PQC algo then).
Encrypt and Sign keys until 2028.
Approved by: so