config() {
  NEW="$1"
  OLD="$(dirname $NEW)/$(basename $NEW .new)"
  # If there's no config file by that name, mv it over:
  if [ ! -r $OLD ]; then
    mv $NEW $OLD
  elif [ "$(cat $OLD | md5sum)" = "$(cat $NEW | md5sum)" ]; then # toss the redundant copy
    rm $NEW
  fi
  # Otherwise, we leave the .new copy for the admin to consider...
}

config etc/logrotate.d/squid.new
config etc/rc.d/rc.squid.new

# If the proxy user/group don't exist, add them:
if grep "^proxy:x:" etc/passwd 1> /dev/null 2> /dev/null ; then
  true
else
  echo "proxy:x:23:23:proxy:/:" >> etc/passwd
fi
if grep "^proxy::" etc/group 1> /dev/null 2> /dev/null ; then
  true
else
  echo "proxy::23:proxy" >> etc/group
fi
if grep "^proxy:" etc/shadow 1> /dev/null 2> /dev/null ; then
  true
else
  echo "proxy:*:12460:0:::::" >> etc/shadow
fi

# Now copy the Squid config files into place if there are not existing copies:
for cfgfile in cachemgr.conf mime.conf msntauth.conf squid.conf ; do
  if [ ! -f etc/squid/${cfgfile} ]; then
    cp -p etc/squid/${cfgfile}.default etc/squid/${cfgfile}
  fi
done