Fix multiple ntp vulnerabilities.

Security: FreeBSD-SA-16:24.ntp
Approved by: so

Fix multiple ntp vulnerabilities.

Security: FreeBSD-SA-16:24.ntp
Approved by: so

- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

MFC r280849,280915-280916,281015-281016,282097,282408,282415,283542,
284864,285169-285170,285435:

ntp 4.2.8p3.

Relnotes: yes
Approved by: re (?)

MFV ntp 4.2.8p1 (r258945, r275970, r276091, r276092, r276093, r278284)

Thanks to roberto for providing pointers to wedge this into HEAD.

Approved by: roberto

Vendor import ntp 4.2.8.

Reviewed by: roberto
Security: VUXML: 4033d826-87dd-11e4-9079-3c970e169bc2
Security: http://www.kb.cert.org/vuls/id/852879
Security: CVE-2014-9293
Security CVE-2014-9294
Security CVE-2014-9295
Security CVE-2014-9296