Automatically init/exit libmdb code

mdb_init() and mdb_exit() are now deprecated.

src/util/mdb-ver.c

@@ -59,11 +59,8 @@ main(int argc, char **argv)
 		exit(1);
 	}
 
-	mdb_init();
-
 	if (!(mdb = mdb_open(argv[optind], MDB_NOFLAGS))) {
 		fprintf(stderr,_("Error: unable to open file %s\n"),argv[optind]);
-		mdb_exit();
 		exit(1);
 	}
 	switch(mdb->f->jet_version) {
@@ -85,8 +82,7 @@ main(int argc, char **argv)
 	}
 	
 	mdb_close(mdb);
-	mdb_exit();
 
-	exit(0);
+	return 0;
 }