[Swan-commit] Changes to ref refs/heads/main

[Antony Antony]

New commits:
commit 0b3937d667bd9f321eed04e14998def7b05726c3
Author: Antony Antony <antony at phenome.org>
Date:   Wed Jun 15 20:28:14 2022 +0000

    _updown.xfrm.in: iptables is optional
    
    if there is iptable support add nflog.

commit b554d3f237e99da28b8e4c8c5362ed3564c9df99
Author: Antony Antony <antony at phenome.org>
Date:   Wed Jun 15 21:31:34 2022 +0000

    pluto: cat and nflog are dependend on HAVE_IPTABLES

commit b96b6b873a369ddb7ecd104fef024f1963cdfc28
Author: Antony Antony <antony at phenome.org>
Date:   Wed Jun 15 20:26:45 2022 +0000

    build: add config variable IPTABLES_BINARY HAVE_IPTABLES
    
    set to iptbales or "" for none and "nft" for future nftable support.
    
    HAVE_IPTABLES for programs to support cat or nflog