MF10 r259974 (MFC r259973):

Tighten default restrictions for ntpd(8) server and provide a link
to NTP access restriction documentation.

Approved by:	re (gjb)
Add manual page entities needed for the -RELEASE build that
do not exist in the doc/release/10.0.0/ tag.

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation
Merge branch 'releng/10.0' of https://github.com/freebsd/freebsd into releng/10.0