- platforms other than NetBSD (Linux, and FreeBSD)?

  PFKEYV2 and XFRM are pretty esoteric.

- /etc/ipsec*

  ipsec.conf, ipsec.secrets and ipsec.d/*

- logrotate https://github.com/libreswan/libreswan/issues/767

  It's a weak dependency / suggested package.  If libreswan is
  using syslog, say, it isn't needed.
