Update mysql

Changes:

- docker-library/mysql@5fa3526: Update to 5.7.28-1debian9
- docker-library/mysql@49bedb5: Update to 5.6.46-1debian9
- docker-library/mysql@367788b: Update to 8.0.18-1debian9
- docker-library/mysql@305192d: Merge pull request docker-library/mysql#599 from infosiftr/really_sourced
- docker-library/mysql@2501cf3: Improve _is_sourced check
- docker-library/mysql@ddf116f: Merge pull request docker-library/mysql#479 from infosiftr/mysql.db-test
- docker-library/mysql@0619155: Update "test" database deletion code with extra query from mysql_secure_installation
- docker-library/mysql@b5a5d78: Merge pull request docker-library/mysql#471 from ltangvald/refactoring
- docker-library/mysql@206541a: Adjust printf to be more resilient; use exit code directly instead of a variable
- docker-library/mysql@91785a5: Add --dont-use-mysql-root-password flag for docker_process_sql
- docker-library/mysql@8d01eea: Fix source detection for centos, call check_config first, explicit global for DATADIR SOCKET
- docker-library/mysql@8a58acb: Adjustments from tianon's comments
- docker-library/mysql@169471f: Apply update.sh to update each entrypoint; drop 5.5 from update.sh
- docker-library/mysql@06acf82: A few entrypoint updates to increase usability
- docker-library/mysql@bbf5d01: Remove empty function docker_wait_for_server
- docker-library/mysql@125ac54: Replace function docker_init_client_command with docker_process_sql
- docker-library/mysql@964f6c2: Merge function docker_load_tzinfo into docker_setup_db
- docker-library/mysql@ce4d14d: Merge function docker_generate_root_password into docker_setup_db
- docker-library/mysql@71962c5: Rename function docker_init_database_dir to docker_create_db_directories
- docker-library/mysql@04b03e0: Merge functions mysql_write_password_file, docker_init_root_user and docker_setup_db_users into docker_setup_db
- docker-library/mysql@880bb34: Rename docker_init_database_user to docker_setup_db_users
- docker-library/mysql@dfa4cb4: Rename docker_expire_root_user to mysql_expire_root_user
- docker-library/mysql@9b90b1c: Move old-mysql-only logic for waiting for server startup into function
- docker-library/mysql@915c792: Rename functions for starting and stopping server
- docker-library/mysql@f1abc95: Rename docker_main to _main
- docker-library/mysql@c9600d2: Rename log functions from docker to mysql
- docker-library/mysql@34ae313: Rename docker_init_env to docker_setup_env
- docker-library/mysql@ae7b623: Rename docker_get_config to mysql_get_config
- docker-library/mysql@5e10737: Rename docker_write_password_file to mysql_write_password_file
- docker-library/mysql@67f2bd3: Rename docker_process_init_file to docker_process_init_files
- docker-library/mysql@1503220: Rename docker_verify_env to docker_verify_minimum_env
- docker-library/mysql@2fcb086: Rename docker_file_env to file_env
- docker-library/mysql@ef9caa9: Rename docker_check_config to mysql_check_config
- docker-library/mysql@9f77ea5: entrypoint: Make value checks more consistent
- docker-library/mysql@33ba3e5: entrypoint: Only execute main function if the script is not sourced
- docker-library/mysql@db2319e: entrypoint: Move main script functionality to function
- docker-library/mysql@f9c185f: entrypoint: Move more logic into functions
- docker-library/mysql@db12713: entrypoint: Use mktemp instead of install
- docker-library/mysql@4672559: Prefix function names in entrypoint with "docker"
- docker-library/mysql@eb2821b: Fix typo templaing->templating
- docker-library/mysql@2242976: Move flag for password file to when the client command is first defined
- docker-library/mysql@03bdbad: Add 5.5 and 5.6 to entrypoint templating
- docker-library/mysql@a9e8576: Template: Use --daemonize for temporary server startup.
- docker-library/mysql@9e51c81: Template: Use mysqladmin to stop temporary server
- docker-library/mysql@ea73775: Template: Store root password in file
- docker-library/mysql@a8aa1cf: Template: Create logging functions
- docker-library/mysql@34f3ef2: Template: Rename template directory to be hidden
- docker-library/mysql@afceb7f: Template: Create functions for starting and stopping server during init
- docker-library/mysql@5a727ad: Make template for 5.7+ entrypoint script
- docker-library/mysql@f16150e: Unify entrypoint scripts for 5.7 and 8.0
- docker-library/mysql@d56d41d: Update generated README
- docker-library/mysql@68f5102: Merge pull request docker-library/mysql#580 from J0WI/https-update
- docker-library/mysql@0f33848: Use https in update.sh

library/mysql

@@ -4,14 +4,14 @@ Maintainers: Tianon Gravi <admwiggin@gmail.com> (@tianon),
              Joseph Ferguson <yosifkit@gmail.com> (@yosifkit)
 GitRepo: https://github.com/docker-library/mysql.git
 
-Tags: 8.0.17, 8.0, 8, latest
-GitCommit: 4af273a07854d7e4b68c5148b8e23b86aa8706e2
+Tags: 8.0.18, 8.0, 8, latest
+GitCommit: 367788b4c0eccf8bf6d10e8897262d22cf816284
 Directory: 8.0
 
-Tags: 5.7.27, 5.7, 5
-GitCommit: 51f9523ad07abacbce90c43eb27390c1c1f76266
+Tags: 5.7.28, 5.7, 5
+GitCommit: 5fa3526d23a846c6a2982901bc8190025af44336
 Directory: 5.7
 
-Tags: 5.6.45, 5.6
-GitCommit: ed0e47e48b8ca3dbc4d68d68f56384bdd1fb5cdb
+Tags: 5.6.46, 5.6
+GitCommit: 49bedb5f999c19d3b931ea8bfd926a5b0a1c1db4
 Directory: 5.6