Add Clemson to list for short/long datasets.

apt/APT_Dataset.pm.in

@@ -135,7 +135,9 @@ sub ValidBlockstoreBackend($)
     my ($domain,$subauth) = split(":", $authority);
     
     return 1
-	if ($domain eq "emulab.net" || $domain eq "apt.emulab.net");
+	if ($domain eq "emulab.net" ||
+	    $domain eq "apt.emulab.net" ||
+	    $domain eq "clemson.cloudlab.us");
 
     return 0;
 }

apt/manage_dataset.in

@@ -217,8 +217,7 @@ sub DoCreate()
 	$aggregate_urn = $aggregate->aggregate_urn();
     }
     else {
-	if ($aggregate_urn ne "urn:publicid:IDN+apt.emulab.net+authority+cm" &&
-	    $aggregate_urn ne "urn:publicid:IDN+emulab.net+authority+cm") {
+	if (!APT_Dataset::ValidBlockstoreBackend($aggregate_urn)) {	
 	    fatal("Invalid cluster selection");
 	}
     }

www/aptui/create-dataset.php

@@ -99,6 +99,7 @@ function SPITFORM($formfields, $errors)
         $amlist = array();
         $amlist["urn:publicid:IDN+apt.emulab.net+authority+cm"] = "APT";
         $amlist["urn:publicid:IDN+emulab.net+authority+cm"] = "Emulab";
+        $amlist["urn:publicid:IDN+clemson.cloudlab.us+authority+cm"] = "Clemson";
 	echo "<script type='text/plain' id='amlist-json'>\n";
 	echo htmlentities(json_encode($amlist));
 	echo "</script>\n";