resolve.confがなんか上書きされるとき

$ cat /etc/resolvconf/resolv.conf.d/original 
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 172.16.0.1

こんなとこにあったのかよ・・

補足

shoichimasuhara@hoge01:~$ cat /etc/issue
Ubuntu 12.10 \n \l

shoichimasuhara@hoge01:~$ uname -a
Linux hoge01 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux