Fix unbound remote denial of service vulnerability.

Security:	FreeBSD-SA-14:30.unbound
Security:	CVE-2014-8602
Approved by:	so
[SA-14:31] Fix multiple vulnerabilities in NTP suite.
[EN-14:13] Fix directory deletion issue in freebsd-update.

Approved by:	so
Merge branch 'releng/10.0' of https://github.com/freebsd/freebsd into releng/10.0

Conflicts:
	sys/conf/newvers.sh