FreeBSD_HEAD - Build #3181 - Fixed

[jenkins-admin at FreeBSD.org]

FreeBSD_HEAD - Build #3181 - Fixed:

Build information: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD/3181/
Full change log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD/3181/changes
Full build log: https://jenkins.FreeBSD.org/job/FreeBSD_HEAD/3181/console

Change summaries:

287460 by glebius:
Make tcp_mtudisc() static and void. No functional changes.

Sponsored by:	Nginx, Inc.

287459 by mav:
Another addition to r287455.

287458 by mav:
Addition to r287455.