o Fix OpenSSH xauth(1) command injection. [SA-16:14]

o Fix OpenSSH xauth(1) command injection. [SA-16:14]
o Fix incorrect argument validation in sysarch(2). [SA-16:15]
o Fix Hyper-V KVP (Key-Value Pair) daemon indefinite sleep. [EN-16:04]
o Fix hv_netvsc(4) incorrect TCP/IP checksums. [EN-16:05]

Errata:         FreeBSD-EN-16:04.hyperv
Errata:         FreeBSD-EN-16:05.hv_netvsc
Security:       FreeBSD-SA-16:14.openssh-xauth, CVE-2016-3115
Security:       FreeBSD-SA-16:15.sysarch, CVE-2016-1885
Approved by:    so

git-svn-id: https://svn.freebsd.org/base/releng/10.2@296955 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f