Don't dump all information about apm when only asked to enable/disable apm

functions (-e and -h switches). This should make apm(8) self-consistent, as
for example -d enable|disable doesn't dump such info.

MFC after:	5 days

usr.sbin/apm/apm.c

@@ -444,9 +444,11 @@ main(int argc, char *argv[])
 			break;
 		case 'e':
 			enable = is_true(optarg);
+			all_info = 0;
 			break;
 		case 'h':
 			haltcpu = is_true(optarg);
+			all_info = 0;
 			break;
 		case 't':
 			batt_time = 1;