Fix possible login(1) argument injection in telnetd(8). [SA-16:36]
Fix link_ntoa(3) buffer overflow in libc. [SA-16:37]
Fix warnings about valid time zone abbreviations. [EN-16:19]
Update timezone database information. [EN-16:20]

Security: FreeBSD-SA-16:36.telnetd
Security: FreeBSD-SA-16:37.libc
Errata Notice: FreeBSD-EN-16:19.tzcode
Errata Notice: FreeBSD-EN-16:20.tzdata
Approved by: so