Add image hash support.

backend/editimageid.in

 #!/usr/bin/perl -wT
 #
 # EMULAB-COPYRIGHT
-# Copyright (c) 2000-2011 University of Utah and the Flux Group.
+# Copyright (c) 2000-2012 University of Utah and the Flux Group.
 # All rights reserved.
 #
 use English;
@@ -140,6 +140,7 @@ my %xmlfields =
      "path"		=> ["path",		$SLOT_OPTIONAL],
      "mbr_version",	=> ["mbr_version",	$SLOT_OPTIONAL],
      "mtype_*"		=> ["mtype",		$SLOT_OPTIONAL],
+     "hash",		=> ["hash",		$SLOT_ADMINONLY],
     );
 #
 # Need a list of node types. We join this over the nodes table so that
@@ -252,7 +253,8 @@ foreach $key (keys(%{ $xmlparse->{'attribute'} })) {
 	    }
 	}
 	if (!$wild) {
-	    $errors{$key} = "Unknown attribute";
+	    # Silently ignore, and delete.
+	    delete($xmlfields{$key});
 	    next; # foreach $key
 	}
     }

backend/newimageid_ez.in

@@ -162,6 +162,7 @@ my %xmlfields =
      "global",		=> ["global",		$SLOT_ADMINONLY,   0],
      "mbr_version",	=> ["mbr_version",	$SLOT_OPTIONAL],
      "reboot_waittime",	=> ["reboot_waittime",	$SLOT_ADMINONLY],
+     "hash",		=> ["hash",		$SLOT_ADMINONLY],
 );
 
 #