Fix multiple vulnerabilities in file(1) and libmagic(3).

Security: FreeBSD-SA-14:28.file
Security: CVE-2014-3710, CVE-2014-8116, CVE-2014-8117

Fix BIND remote denial of service vulnerability.

Security: FreeBSD-SA-14:29.bind
Security: CVE-2014-8500

Approved by: so