/lib/libnss_dns.so.* but could also be e.g.
/lib/x86_64-linux-gnu/libnss_dns.so.*.
---- a/hooks/live
-+++ b/hooks/live
-@@ -260,7 +260,16 @@
+Index: live-boot-grml/hooks/live
+===================================================================
+--- live-boot-grml.orig/hooks/live 2011-12-06 22:10:47.000000000 +0100
++++ live-boot-grml/hooks/live 2011-12-06 22:10:55.000000000 +0100
+@@ -268,7 +268,16 @@
# DNS for initramfs
#copy_exec /lib/libnss_files.so.* /lib # /etc/hosts and /etc/passwd