Added a way to add arbitrary entries in /etc/hosts .

svn path=/nixos/trunk/; revision=9528

etc/default.nix

@@ -45,7 +45,10 @@ import ../helpers/make-etc.nix {
     }
 
     { # Hostname-to-IP mappings.
-      source = ./hosts;
+      source = pkgs.substituteAll{
+	src = ./hosts;
+	extraHosts = config.get ["networking" "extraHosts"];
+	};
       target = "hosts";
     }
 

etc/hosts

@@ -1 +1,2 @@
 127.0.0.1 localhost
+@extraHosts@

system/options.nix

@@ -235,6 +235,12 @@
     description = "The name of the machine.";
   }
 
+  {
+	name = ["networking" "extraHosts"];
+	default = "";
+	example = "192.168.0.1 lanlocalhost";
+	description = "Pasted verbatim into /etc/hosts.";
+  }
 
   {
     name = ["networking" "useDHCP"];