Mine

Index: package/base-files/default/sbin/ifup
===================================================================
--- package/base-files/default/sbin/ifup        (revision 255)
+++ package/base-files/default/sbin/ifup        (working copy)
@@ -29,8 +29,18 @@

        config_get mode $ifn mode
        config_get ipaddr $ifn ipaddr
+
+       rm -f /etc/resolv.conf
        touch /tmp/resolv.conf
        case "$mode" in
+               static)
+                       ln -s /tmp/resolv.conf /etc/resolv.conf
+               ;;
+               *)
+                       ln -s /etc/resolv.conf.fon /etc/resolv.conf
+               ;;
+               esac
+       case "$mode" in
                static)
                        config_get netmask $ifn netmask
                        config_get dhcp $ifn dhcp
Index: package/base-files/Makefile
===================================================================
--- package/base-files/Makefile (revision 255)
+++ package/base-files/Makefile (working copy)
@@ -154,7 +154,6 @@
        mkdir -p $(1)/usr/bin
        mkdir -p $(1)/sys
        mkdir -p $(1)/www
-       ln -sf /tmp/resolv.conf $(1)/etc/resolv.conf
        ln -sf /proc/mounts $(1)/etc/mtab
        rm -f $(1)/var
        ln -sf /tmp $(1)/var