Some accrued fixes/updates.

* cp/mv now accepts (and ignores) the -f flag, since it always
	does force anyway
    * tail can now accept -<num> commands (e.g. -10) for better
	compatibility with the standard tail command
    * added a simple id implementation; doesn't support supp. groups yet

loadkmap.c

@@ -51,6 +51,7 @@ int loadkmap_main(int argc, char **argv)
 	}
 
 	read(0, buff, 7);
+	printf("buff='%s'\n", buff);
 	if (0 != strncmp(buff, magic, 7)) {
 		fprintf(stderr, "This is not a valid binary keymap.\n");
 		exit(FALSE);