* Flush the nscd hosts table after we've acquired an DHCP lease to

prevent problems with negative caching (NIXOS-45).

svn path=/nixos/trunk/; revision=7763

system/etc.nix

@@ -62,7 +62,7 @@ import ../helpers/make-etc.nix {
     { # Dhclient hooks for emitting ip-up/ip-down events.
       source = pkgs.substituteAll {
         src = ./etc/dhclient-exit-hooks;
-        inherit (pkgs) upstart;
+        inherit (pkgs) upstart glibc;
       };
       target = "dhclient-exit-hooks";
     }

system/etc/dhclient-exit-hooks

@@ -2,6 +2,7 @@ echo "$reason" >> /tmp/dhcp-exit
 echo "$exit_status" >> /tmp/dhcp-exit
 
 if test "$reason" = BOUND -o "$reason" = REBOOT; then
+    @glibc@/sbin/nscd --invalidate hosts
     @upstart@/sbin/initctl emit ip-up
 fi