sysown/proxysql v1.2.0d

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Version v1.2.0d introduces significant changes to v1.2.0c in order to improves usability and stability, and should be considered experimental.
Changes:

• Reduced the memory footprint of some classes (MySQL_Thread, MySQL_Session, MySQL_Data_Stream)
• several minor optimizations
• removed libinjection , issue #424
• upgraded jemalloc from 3.6.0 to 4.1.0
• added support for more commands in __query_parser_command_type : START TRANSACTION , SET , SHOW , SHOW TABLE STATUS
• auto tuning of shun_recovery_time_sec , issues #530 and #531
• disable multiplexing for LOCK TABLE in addition to LOCK TABLES
• deprecated the use of mysql_close() , replace with close_mysql() , a non blocking wrapper
• enforced mysql-ping_timeout_server, issue #535
• enforced mysql-monitor_replication_lag_timeout, issue #541
• enforced mysql-monitor_ping_timeout, issue #542
• implemented mysql-monitor_ping_max_failures that defines the number of missed heartbeats before considering a backend to be dead, issue #544
• kills all connections to a backend if failed, issue #543
• balance connections usage based on weight and used connections, useful in case of server failure. Issue #545
• added support for CentOS 6.7
• added support for CentOS 7
• added support for Ubuntu 15.10
• fixed bug in initial handshake
• bug fixes in handling of SET AUTOCOMMIT
• re-executes queries in Admin if SQLite3 is busy
• allows online upgrade from v1.1.x