[Clip] /etc/puppet/modules/AC-7/manifests/init.pp: create new symlink for /etc/pam.d/system-auth

[Aaron Prayther]

I did not see in the CLIP stuff anywhere rewriting the system-auth-ac
--> system-auth symlink so that authconfig won't rewrite killing
changes.

/bin/cp /etc/pam.d/system-auth-ac /etc/pam.d/system-auth.custom
/bin/rm /etc/pam.d/system-auth && cd /etc/pam.d && ln -s
system-auth.custom system-auth

Prevents authconfig from rewriting the file.

Aaron Prayther