Make portstats runnable from ops, so that all users can use it.

Also improved the usage message.

security/paperbag.in

@@ -26,7 +26,8 @@ my $TB		= "@prefix@";
 		"create_image"	=> "$TB/bin/create_image",
 		"node_admin"	=> "$TB/bin/node_admin",
 		"delay_config"	=> "$TB/bin/delay_config",
-		"savelogs"	=> "$TB/bin/savelogs"
+		"savelogs"	=> "$TB/bin/savelogs",
+		"portstats"	=> "$TB/bin/portstats"
 	   );
 
 # Need to provide a simple path, because some scripts we call need one

tbsetup/GNUmakefile.in

@@ -16,7 +16,8 @@ BIN_STUFF	= power snmpit tbend tbswapin tbswapout tbprerun tbreport \
 		  portstats
 
 # Stuff that mere users get on plastic.
-USERBINS        = os_load node_reboot nscheck node_update savelogs node_control
+USERBINS        = os_load node_reboot nscheck node_update savelogs \
+		  node_control portstats
 
 SBIN_STUFF	= resetvlans console_setup.proxy sched_reload named_setup \
 		  batch_daemon exports_setup reload_daemon sched_reserve \

tbsetup/portstats.in

@@ -22,14 +22,23 @@ use Getopt::Long;
 use strict;
 
 sub usage {
-    print "Usage: $0 [-h] <pid> <eid> [vname ...] [vname:port ...]\n\n";
-    print "If only pid and eid are given, prints out information about all\n";
-    print "ports in the experiment. Otherwise, output is limited to the\n";
-    print "nodes and/or ports given.\n";
-    print "\n";
-    print "-h    This message\n";
-    print "-e    Show only error counters\n";
-    print "-a    Show all stats\n";
+    print << "END";
+Usage: $0 [-h] <pid> <eid> [vname ...] [vname:port ...]
+-h    This message
+-e    Show only error counters
+-a    Show all stats
+
+If only pid and eid are given, prints out information about all ports in the
+experiment. Otherwise, output is limited to the nodes and/or ports given.
+
+NOTE: Statistics are reported from the switch's perspective. This means that
+'In' packets are those sent FROM the node, and 'Out' packets are those
+sent TO the node.
+
+In the output, packets described as 'NUnicast' or 'NUcast' are non-unicast
+(broadcast or multicast) packets.
+END
+
     return 1;
 }
 

xmlrpc/xmlrpcbag.in

@@ -26,7 +26,8 @@ my $TB		= "@prefix@";
 		"create_image"	=> "$TB/bin/create_image",
 		"node_admin"	=> "$TB/bin/node_admin",
 		"delay_config"	=> "$TB/bin/delay_config",
-		"savelogs"	=> "$TB/bin/savelogs"
+		"savelogs"	=> "$TB/bin/savelogs",
+		"portstats"	=> "$TB/bin/portstats"
 	   );
 
 # Need to provide a simple path, because some scripts we call need one