Correct the bridge command name in help messages

The bridge command used to be called br but was renamed bridge. Correct
the outdated references to the br name in the help messages, together with a
typo of '-help' for 'help'.

Signed-off-by: Chris Webb <chris@arachsys.com>
diff --git a/bridge/monitor.c b/bridge/monitor.c
index 37468e6..3790a84 100644
--- a/bridge/monitor.c
+++ b/bridge/monitor.c
@@ -1,5 +1,5 @@
 /*
- * brmonitor.c		"br monitor"
+ * brmonitor.c		"bridge monitor"
  *
  *		This program is free software; you can redistribute it and/or
  *		modify it under the terms of the GNU General Public License
@@ -31,7 +31,7 @@
 
 static void usage(void)
 {
-	fprintf(stderr, "Usage: br monitor\n");
+	fprintf(stderr, "Usage: bridge monitor\n");
 	exit(-1);
 }
 
@@ -103,7 +103,7 @@
 		} else if (matches(*argv, "help") == 0) {
 			usage();
 		} else {
-			fprintf(stderr, "Argument \"%s\" is unknown, try \"br monitor help\".\n", *argv);
+			fprintf(stderr, "Argument \"%s\" is unknown, try \"bridge monitor help\".\n", *argv);
 			exit(-1);
 		}
 		argc--;	argv++;