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

[Andrew Cagney]

New commits:
commit e32533467461de8d555e5dd5683c9b296ff6265a
Author: Andrew Cagney <cagney at gnu.org>
Date:   Tue May 10 21:19:12 2022 -0400

    iface: call setsockopt(fd, IPPROTO_IPV6, IPV6_USE_MIN_MTU)
    
    and not setsockopt(fd, SOL_SOCKET, IPV6_USE_MIN_MTU)
    
    Per linux ipv6(7):
      The socket option level for IPv6 is IPPROTO_IPV6.
    although IPV6_USE_MIN_MTU isn't documented.
    
    Per BSD ip6(4)
      ... getsockopt(2) and setsockopt(2) system calls at level IPPROTO_IPV6