git: udp: Port IPPROTO_IP/IP_TOS cmsg support from FreeBSD.

[Sepherosa Ziehau]

commit a45b89791953e820c4b27fafe78163c88a3f5d53
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Fri Dec 4 20:43:15 2020 +0800

    udp: Port IPPROTO_IP/IP_TOS cmsg support from FreeBSD.

Summary of changes:
 sys/netinet/udp_usrreq.c |  6 ++---
 test/udp/tos/udp_tos.c   | 62 +++++++++++++++++++++++++++++++++++-------------
 2 files changed, 49 insertions(+), 19 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/a45b89791953e820c4b27fafe78163c88a3f5d53


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