[Bug 206721] FreeBSDs DHCP client(dhclient) does not support the interface-mtu option(option 26).

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206721

--- Comment #22 from commit-hook at freebsd.org ---
A commit references this bug:

Author: cem
Date: Thu May 31 19:36:25 UTC 2018
New revision: 334443
URL: https://svnweb.freebsd.org/changeset/base/334443

Log:
  dhclient(8): allow to supersede interface-mtu option

  In some cases broken DHCP servers might send invalid MTU value, so allow to
  use 'supersede' in dhclient.conf to override this. When superseded value is
  0, MTU value is not updated at all.

  PR:           206721
  Submitted by: novel@
  Reported by:  <jimp AT pfsense.org>
  MFC after:    37 minutes (if you care about 11, please MFC to 11.2)
  Relnotes:     yes (potentially surprising behavior change w/ broken dhcpd
mtu)
  Differential Revision:        https://reviews.freebsd.org/D15484

Changes:
  head/sbin/dhclient/dhclient.c
  head/sbin/dhclient/dhclient.conf.5

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