MySQL 5.7.10でmysql_install_dbを実行したときのWarning

MySQL 5.7.10のインストール直後、mysql_install_dbコマンドを実行したところ、何やらワーニングが出ました。

$ sudo /usr/local/mysql/bin/mysql_install_db --basedir=/usr/local/mysql \
--datadir=/usr/local/mysql/data --user=mysql
2016-01-15 22:58:58 [WARNING] mysql_install_db is deprecated. Please consider switching to mysqld --initialize
2016-01-15 22:59:25 [WARNING] The bootstrap log isn't empty:
2016-01-15 22:59:25 [WARNING] 2016-01-15T13:58:58.358600Z 0 [Warning] --bootstrap is deprecated. Please consider using --initialize instead
2016-01-15T13:58:58.393073Z 0 [Warning] Changed limits: max_open_files: 1024 (requested 5000)
2016-01-15T13:58:58.393105Z 0 [Warning] Changed limits: table_open_cache: 431 (requested 2000)