[Midnightbsd-cvs] src: ncache.c: Fix a highly exploitable vulnerability in BIND caching

[laffer1 at midnightbsd.org]

Log Message:
-----------
Fix a highly exploitable vulnerability in BIND caching nameserver feature.

CVE-2011-1910

Modified Files:
--------------
    src/contrib/bind96/lib/dns:
        ncache.c (r1.1.1.3 -> r1.2)
        (http://cvsweb.midnightbsd.org/src/contrib/bind96/lib/dns/ncache.c?r1=1.1.1.3&r2=1.2)