[radvd-devel-l] radvd v2.21 released contains security fix

[Robin H. Johnson]

2026/05/25: Release v2.21
    feat: release v2.21
    feat: harden radvdump (CVE-2026-48715, thanks to @TristanInSec)
    feat: RFC8319 support: Increase max AdvDefaultLifetime and MaxRtrAdvInterval
    feat: Add DHCPv6-PD preferred flag
    build: docker updates
    build: README moved
    git ignore more
    ci: recent fedora needs awk
    ci: add stock GitHub CodeQL scanning before customization
    ci: setup codeql build-mode=manual
    build: update configure.ac using autoupdate-2.69 from ubuntu20.04
    ci: workaround makefile dep ordering issue
    ci: more autoconf for codeql
    ci: always parallel build
    ci: bleeding edge autoupdate causes large codeql failure
    ci: stricter build triggers
    ci: bsd make != linux make
    build: correctness & testcase for CodeQL
    test: increase snprintf safety
    fix: improve file checks for procfs knobs
    ci: lock down workflow permissions
    feat: allow libc strlcpy
    ci: fix non-immutable Action
    build: bsd has libcheck available as well
    ci: improve BSD workflow to run tests
    fix: make libcheck fatal if missing with --with-check
    build: drop ubuntu20.04 due to EOL
    chore: debug max_ra_option_size calculation
    chore: skip ND_OPT_CAPTIVE_PORTAL parsing in received main radvd
    ci: test on ubuntu-26.04
    refactor: make drop_root_privileges reusable
    fix: support incoming jumbo packets
    doc: update reporting location
    ci: ensure autoconf+automake for opensuse
    ci: ensure make for opensuse
    ci: ensure bison+flex for opensuse
    ci: disable ubuntu-26.04 target
    ci: ensure xz for opensuse
    doc: improve AUTHOR tracking and contact info
    doc: SECURITY
    Avoid libbsd header with libc strlcpy

-- 
Robin Hugh Johnson (they/he)
Gentoo Linux: Dev, Infra Lead, Foundation Treasurer
E-Mail   : robbat2 at gentoo.org
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