apm doesn't take arguments

[Ted Unangst]

apm should not silently ignore bonus args.


Index: apm.c
===================================================================
RCS file: /cvs/src/usr.sbin/apm/apm.c,v
retrieving revision 1.34
diff -u -p -r1.34 apm.c
--- apm.c       14 Aug 2018 06:38:33 -0000      1.34
+++ apm.c       28 Feb 2019 16:59:41 -0000
@@ -242,6 +242,10 @@ main(int argc, char *argv[])
                                usage();
                }
        }
+       argc -= optind;
+       argv += optind;
+       if (argc)
+               usage();
 
        fd = open_socket(sockname);