[CentOS] resolv.conf rewritten every reboot. How to figure out who and why?

Quoting Dave <tdbtdb+centos at gmail.com>:

> On Thu, Oct 8, 2009 at 11:44 AM, Craig White <craigwhite at azapple.com> wrote:
> > On Thu, 2009-10-08 at 11:19 -1000, Dave wrote:
> >> [root at lee1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
> [snip]
> >> PEERDNS=yes
> > - ^^^^^^^^^^^
> > change to PEERDNS=no
>
>
> What man page would tell me what this means? How should I have known
> that's what I should do, if I were lacking the luxury of being told by
> one wiser than myself?

/usr/share/doc/initscripts-*/sysconfig.txt