Downcase group names on plab nodes. This is bound to cause problems

for someone since the names won't match local nodes, but not going to
worry about till it happens.

tmcd/common/libsetup.pm

@@ -1307,6 +1307,10 @@ sub doaccounts()
 	    #
 	    my $gname = "$1";
 
+	    # New plab images are stupid.
+	    $gname = lc($gname)
+		if (PLAB());
+	    
 	    if (REMOTE() && !JAILED() && !PLAB()) {
 		$gname = "emu-${gname}";
 	    }

tmcd/libsetup.pm

@@ -1307,6 +1307,10 @@ sub doaccounts()
 	    #
 	    my $gname = "$1";
 
+	    # New plab images are stupid.
+	    $gname = lc($gname)
+		if (PLAB());
+	    
 	    if (REMOTE() && !JAILED() && !PLAB()) {
 		$gname = "emu-${gname}";
 	    }